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Table of Content

    01 February 2008, Volume 23 Issue 1 Previous Issue    Next Issue
    Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS
    Progress in the Research on the Impact of Glacial Change on Water Resources
    LI Zhi-guo, YAO Tan-dong, TIAN Li-de
    2008, 23 (1):  1-8.  doi: 10.11849/zrzyxb.2008.01.001
    Abstract ( )   PDF (243KB) ( )   Save
    Glacier is an important kind of fresh water resources. The glacier change not only affects obviously water resources in and around mountain area, but also contributes greatly to sea level rise. Thus, it becomes the focus of attention. Reviewing international and domestic studies, this article puts forward that there is still a big gap between native research and foreign ones in scope and depth. Especially, there are few studies on the process and mechanism of melt-water production and forecast models are lagging behind in types, conceptual framework and technical means. The impact of west glacier water resources change on socioeconomy and ecological environment must be taken into consideration in the process of Western Development, and it is urgent to strengthen related monitoring and researches.
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    The Study of Bio-energy Plants Development from Non-tillage Resource of Coastal Mudflat
    LIU Zhao-pu, LONG Xiao-hua, LIU Ling, ZHAO Geng-mao
    2008, 23 (1):  9-14.  doi: 10.11849/zrzyxb.2008.01.002
    Abstract ( )   PDF (265KB) ( )   Save
    According to the actuality of the development of bio-energy in China, the ideas of making full use of the non-tillage resource of coastal mudflat to develop bio-energy plants were pointed out in the paper. Some bio-energy plants that are suitable to be extensively cultivated in coastal mudflat were collected. A few seawater-tolerance and high-yield varieties of glucide bio-energy plants (Helianthus Tuberosus) and bio-oil plant (oleic sunflower) were sifted. At the same time, the field experiments were carried out in Dafeng of Jiangsu province and Laizhou of Shandong province. The sugar yields of H. Tuberosus were in the scope from 16160 kg/ha to 12102 kg/ha. The oil yield of oleic sunflower was about 2934 kg/ha. The colligate uses of H. Tuberosus and oleic sunflower were also disscussed conducively.
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    The Analysis on Environmental and Economic Cost of Rural Household Energy Consumption in Loess Hilly Region of Gansu Province
    LI Guo-zhu, NIU Shu-wen, YANG Zhen, ZHANG Xin
    2008, 23 (1):  15-24.  doi: 10.11849/zrzyxb.2008.01.003
    Abstract ( )   PDF (520KB) ( )   Save
    Due to poverty in economy, serious soil erosion and shortage of rural household energy in loess hilly region of Gansu Province, excessive consumption of biofuel becomes an important driving factor of eco-environmental of degeneration. Data on rural household energy use was obtained by questionnaires in this research, and based on substitutable analysis, environmental and economic costs under different energy consumption structures were estimated by the quantitative model. Results show that one family consumes 2112.44 kgce and per capita 428.59kgce per year at present, an indication of a lower level of energy consumption. The total energy consumption cost of per household is 1925.65yuan/a, in which the environmental cost is 621.13 yuan/a and the economic cost is 1304.52 yuan/a. Commercial energy has been used widely. The per household cash payment is 536.51yuan/a that is 8.69% of the household net income. The full use of solar energy and biogas can obviously decrease the above-mentioned cost of energy consumption. Cash payout and gettable capacity of energy are the main reasons for the rural households to choose energy categories. To compare with the actual structure of energy usage, there are obvious differences on the total cost, the environment cost, economic cost and cash payout for households among the four substitutable structures. Each item of cost is lower when biogas and solar energy are used, so this structure is the primary direction for the future development of rural energy.
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    Threats on the World Heritage Natural Sites and China’s Conservation Countermeasures
    ZHOU Nian-xing, LIN Zhen-shan, HUANG Zhen-fang, PAN Gang
    2008, 23 (1):  25-32.  doi: 10.11849/zrzyxb.2008.01.004
    Abstract ( )   PDF (424KB) ( )   Save
    With the subscription on the Convention Concerning the Protection of the World Cultural and Natural Heritage and going deep into the conservation and management, China’s natural heritage movement flourished. But the conservation is not ideal. On the basis of the extensive information collecting, the principle of integrity for the conservation of the natural heritage sites was put forward and the studies on the threats of worldwide natural heritage sites were carried out. It is confirmed that there is difference between the OECD and Non-OECD countries in the threats for those of the Non-OECD countries mainly include hunting, logging and poor management while the OECD countries are introduced species. Tourism pressure, mining and road construction are the common threats. Dam construction, natural disaster, and surrounding pollution may be the potential threats. The conservation status of China’s nine world natural heritage sites (five natural sites and four mixed sites) are also discussed. Among China’s threats of natural heritage sites, tourism pressure ranks first, and then management constrains, dam construction, road construction and natural disaster. The countermeasures for conserving China’s natural heritage sites are put forward: (1) from the point of theory, the theory on natural conservation should be reconstructed based on the principle of integrity;(2) from the point of practice, the threats of tourism development, dam construction and introduced species should be dealt with urgently;(3) from the point of institution, the authenticity and responsibility of the central government should be strengthened, the management system be consolidated, laws and regulations be formulated, etc.
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    Landscape Ecological Risk Assessment of Natural/Semi-natural Landscapes in Fast Urbanization Regions —A Case Study in Beijing, China
    LI Jing-gang, HE Chun-yang, LI Xiao-bing
    2008, 23 (1):  33-47.  doi: 10.11849/zrzyxb.2008.01.005
    Abstract ( )   PDF (1139KB) ( )   Save
    How to effectively and reasonably assess the ecological risk of the natural/semi-natural landscapes under the fast urbanization process is helpful to optimize the urban land use pattern and to reduce and keep away the urban environment venture. So, in this paper, firstly based on the Landsat TM/ETM+ data in 1991, 1997, 2000 and 2004 and combining with the geographic information system (GIS) and landscape analysis techniques, the landscape pattern changes in Beijing region from 1991 to 2004 were measured. Then through quantifying the influences from four factors of inner stability, neighborhood stability, external accessibilities and external pressure within every natural/semi-natural landscape cell, a multi-factor evaluating model for the spatial ecological risk of landscape was constructed. And finally using the model the spatial ecological risk level of natural/semi-natural landscapes in Beijing region was assessed in the process of fast urban expansion from 1991 to 2004. The research showed that: (1)With the rapid urbanization process, the primary characteristic of the landscape changes in Beijing region was the persistent increase of factitious building landscape and the substantial decrease of cropland landscape from 1991 to 2004. The proportion of factitious building landscape cells increased from 5.58% in 1991 to 12.72% in 2004, and that of cropland landscape cells decreased from 33.14% in 1991 to 22.19% in 2004, with approximately an average annual reduction rate of 1%. In the meantime, there also was a durative increasing for the woodland landscape. (2)The landscape ecological risk level of the natural/semi-natural landscapes in the study area put up an ascending tendency during 1991 to 2004. For the natural/semi-natural landscapes in mountain regions, the landscape ecological risk level was better than that in plain areas, and the impact of the rapid urbanization process on the landscape ecological risk level of mountain regions was comparatively faint. (3)There also existed some differences among all the natural/semi-natural landscape styles in the study area. The landscape ecological risk level of forest landscape was the lowermost, and the mixed landscape was the topmost, namely the effect of the fast urbanization process to the fixed landscape was most obvious. (4)The newly increased landscape cells of construction land from 1991 to 2004 in Beijing region were primarily from the landscapes of cultivated land and mixed styles, and the total amount from the two landscape styles was more than 95%. Especially to the mixed landscape, the percentage was the highest and exceeded 60%.
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    Impact Assessment of Dams & Flood Gates Projects of Huaihe River on River Ecosystem:A Case Study of the Bengbu Site
    XIA Jun, ZHAO Chang-sen, LIU Ming, WANG Gang-sheng, ZHANG Yong-yong, LIU Yu
    2008, 23 (1):  48-60.  doi: 10.11849/zrzyxb.2008.01.006
    Abstract ( )   PDF (976KB) ( )   Save
    This paper addresses a method applied to the impact assessment of dams & flood gates projects in Huaihe River on river ecosystem. Major contents include: 1) the river ecosystem survey in 2006 and related historical investigation; 2) building coupled models of river hydrological process with water quality and ecosystem indicators system; and 3) development of assessment method applied to impact assessment of dams & flood gates projects in Huaihe River on river ecosystem, where the relationship between ecosystem indicators and water quality indicators could be recognized. The case study of the Bengbu site was given as an explanation of this method. The results indicate that dams and flood gates projects have significant impact on river ecosystem. For Bengbu case, the biggest impact is on phytoplanktons of the aquatic ecosystem, then on zooplanktons and zoobenthos. By comparison with historical ecosystem situation, the ecosystem quality of downstream of Bengbu site has a decline due to dams and gates construction. By the way, it also shows that river system could be improved by strengthening operation of river ecosystem and increasing ecological flow.
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    Decomposition Effect on China’s Annual Ecological Footprints Variation from 1990 to 2004
    LIU Jian-xing, WANG Qing, SUN Peng, GU Xiao-wei, LI Guang-jun
    2008, 23 (1):  61-68.  doi: 10.11849/zrzyxb.2008.01.007
    Abstract ( )   PDF (638KB) ( )   Save
    There is a certain impact and influence on the ecological environment when human utilizes natural resources and obtain access to the ecological services function nature provides. Ecological footprint indicator is such an integrated indicator to measure the use of human resources and the effects on the ecological environment. The ecological footprint is not only a means to record the process of the survival and development of mankind’s ecological resources of changing history, but also embodies the scale of economic development and the evolution of consumption levels for each stage. Through building the decomposition model of ecological footprint, variable of ecological footprints of China during the period from 1990 to 2004 was decomposed to three different changing effects, namely GDP, structure of industry economy and ecological footprint identity of industries, and each decomposition effect was measured and analyzed in this study.The results show that: 1) Varied factors impacted together on variation of ecological footprints and these factors exerted different effects on the variable of general ecological footprints in different periods of time. From 1990 to 2004 the total footprint changes always show an increasing trend. Inter-annual change’ mean of ecological footprint is 2.1082×108ha, thereinto, the scale of economic development, the industrial structure and the identity of industries ecological footprint have different contributions to the change, being 2.1082×108ha, -0.6029×108ha and -0.4398×108ha respectively. 2) Growth of GDP is a drive to the increase of the general ecological footprints, while the change in industrial structure and increase of ecological footprint identity of industries constrain the growth of the general ecological footprints variation on the contrary. 3) It is a key in depression periods of time to reduce growth of ecological footprints by adjusting structure of industry economy and improving identity of ecological footprint. This research will promote understanding the theory about harmonous development stratagem and development occasions, and possess reference value by all means to the adjustment of policy of industrial development and the study of sustainable development relatively.
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    Research on Space Modeling for Minimum Urban Ecological Land Based on GIS: A Case in Shenzhen
    ZHANG Lin-bo, LI Wei-tao, WANG Wei, XIONG Yan-jun
    2008, 23 (1):  69-78.  doi: 10.11849/zrzyxb.2008.01.008
    Abstract ( )   PDF (764KB) ( )   Save
    In the 21st century, global urbanization has become an inevitable trend of the development of human society, urban expansion would unavoidably transform ecological land-use such as forest, farmland, grassland, swamps and water area, which have important ecological service functions, into land used for urban construction purpose. Consequently, this will exert great impact on ecosystem in the urban, the regional and even global scopes. In the future rapid urbanization process, it is very important to protect necessary ecological land-use for sustaining well-being of urban ecosystem itself, improving living standards of urban citizens and realizing urban sustainable development. With a case study of Shenzhen, a special economic zone of China, this paper combined ecological conceptual model of landscape with assessment methods for valuation of ecosystem service function, and with the support of GIS technique, established a spatial analysis model for urban minimum ecological land-use. Meanwhile, according to four scenes which reserved ecological land-use respectively by 30%, 40%, 50% and 60%, it analyzed the reasonable spatial distribution of minimum ecological land-use. The outcome demonstrated that the minimum ecological land-use model can extract the type of lands which have important urban ecological service functions.
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    Analysis on Wetland Shrinking Characteristics and Its Cause in Heilongjiang Province for the Last 50 Years
    NING Jing, ZHANG Shu-wen, LI Ying, WANG Lei
    2008, 23 (1):  79-86.  doi: 10.11849/zrzyxb.2008.01.009
    Abstract ( )   PDF (478KB) ( )   Save
    Based on RS and GIS technology, the paper studied the spatial characteristics of marsh change in Heilongjiang Province and analyzed the influence of human activities on marsh. What’s more, we knew of the spatial characteristics of marsh in the field of administration planning. The authors reconstructed spatial data of wetlands from 1954 to 2000 by integrating topographic map in 1954 and TM image in 2000 in Heilongjiang Province. Furthermore, combining patch centroid change model, landscape parameters and Euclid shortest-path function, we analyzed marsh shrinking characteristics and regularity of regional differentiation, and further discussed the cause of marsh shrinking in the perspective of the impact of human activities on marsh shrinking. The results showed that: area of wetlands had dramatically decreased from 7.914 million ha to 3.035 million ha in Heilongjiang Province for the last 50 years; in general, the centroid of marsh moved to the northwest of Heilongjiang Province, which showed that marsh shrinking maily occurred in the northeast; marsh landscape went to fragmentation; the shrinking areas were mainly concentrated in the Sanjiang Plain, Songnen Plain, Da Xing’an Mountains and Xiao Xing’an Mountains. There are three major humanity reasons which led to marsh shrinking: population growth and constant land reclamation; farm development policy of building state farm; and the spatial relationship between wetland shrinking and major highways.
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    The Research about Ecological Carrying Capacity of Mining Cities in Central Liaoning
    GU Kang-kang, LIU Jing-shuang, DOU Jing-xin
    2008, 23 (1):  87-94.  doi: 10.11849/zrzyxb.2008.01.010
    Abstract ( )   PDF (445KB) ( )   Save
    Ecological footprints model is a method of measuring the sustainable development. In recent years, ecological footprints model has been a widely accepted tool to quantify the sustainable development level in many fields. However, ecological footprints model neglected the sustainability of economy and science technology. In order to improve the veracity of the model we join the economic factors, and they would provide suggestions for the sustainable development of mining cities in central Liaoning. We calculated ecological footprints(EF),ecological carrying capacity(EC) and budget of mining cities in central Liaoning between 1985 to 2005 by ecological footprints model; after coupling ecological footprint, ecological carrying capacity and economic factors by P-S-R model, we got synthetic ecological carrying capacity index and estimated synthe-tic ecological carrying capacity level of mining cities in central Liaoning between 1985 to 2005. Results showed that: in mining cities in central Liaoning between 1985 to 2005, the EF increased from 1.79 ha to 3.53 ha, the increasing rate was 97.43%; the EC increased from 0.78 hm2 to 0.81 ha; the budget increased from -1.01 ha to -2.73 ha, the increasing rate was 190.17%; the synthetic ecological carrying capacity index reduced first, then increased from 2000; the synthetic ecological carrying capacity level was very high in 1985, lower in 1990, common in 1995 and 2000, and high in 2003 and 2005. The changing trend between ecological carrying capacity and synthetic ecological carrying capacity index was alike. The test result indicated that synthetic ecological carrying capacity index was developed from ecological carrying capacity, the relativity between them was high; and the synthetic ecological carrying capacity index was coupled by ecological carrying capacity, ecological footprints and economic factors, the richness of indicators could also improve the veracity of the estimated results. So the explorative research of ecological footprints model and economic factors was carried out which could give some use for reference of the other research about ecological footprints model.
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    Situation Evaluation on River Channel Ecological Water Requirements of Seven Major Basins in China
    WANG Xi-qin, ZHANG Yuan
    2008, 23 (1):  95-102.  doi: 10.11849/zrzyxb.2008.01.011
    Abstract ( )   PDF (203KB) ( )   Save
    According to attributes of ecological water requirements, evaluation methods of river ecological flow was proposed in terms of water quantity and water quality. The water quantity evaluation methods included water resources utilization ratio method, measured runoff method, consumption coefficient method; and the water quality evaluation method was established based on wastewater-runoff ratio factors. The standards for water quantity and water quality evaluation were also proposed. Seven major basins of China, including the Songhuajiang River, the Liaohe River, the Haihe River, the Yellow River, the Huaihe River, the Yangtze River, and the Zhujiang River, were studied as examples by using the above methods. The results indicated that if these rivers were evaluated merely from water quantity, the ecological flow is lower than the water requirements standards in the Haihe River and the Yellow River; however, if these basins were evaluated at the same time of water quantity and water quality, the ecological flow is higher than the water requirement standards only in the Songhuajiang River, the Yangtze River and the Zhujiang River. These showed that actual ecological water shortage could be revealed only by evaluation methods on the basis of "water quantity" and "water quality" in China.
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    Simulation and Analysis of Water Balance in Cropland under Climate Change in Northwest China
    YANG Yan-zhao, FENG Zhi-ming, HUANG He-qing
    2008, 23 (1):  103-112.  doi: 10.11849/zrzyxb.2008.01.012
    Abstract ( )   PDF (906KB) ( )   Save
    Global warming affects regional sustainable development but there has been lacking in an appropriate approach to assess the impacts. By applying Arc/GIS and Visual Foxpro technologies, this study performs systematical simulation and analysis of the variations in the monthly cropland water balance for 12 major crops in Northwest China over the last 40 years (1960-2000). For 313 counties in the region, it shows that the precipitation and soil water are generally unable to meet the water requirements of the crops. The deficit of cropland water tends to increase from the southeast to the northwest and from mountains to lower basins. By analyzing the anomaly percentage of cropland water balance, this study shows that during the last 40 years, the western part of Northwest China, mainly the Xinjiang Uygur Autonomous Region, has shown a moderate increase both in temperature and precipitation, a slight shift to a warm-wet pattern in climate, and a moderate decrease in water deficit. In contrast, the central and eastern parts of the region have encountered a moderate increase in temperature, a relatively significant decrease in precipitation (especially in recent 10 years), and a moderate increase in water deficit. Furthermore, this study classifies the region into 13 agro-ecological zones and examines the variance of cropland water balance over the last 40 years through analyzing the variation of Cv in these zones. It is shown that in Hexi Corridor of Gansu and Xinjiang Uygur Autonomous Region, Cv is the lowest (<0.10), while in hilly areas around Sichuan Basin Cv takes the highest value of 2.1. In most parts of Northwest China, a significant positive correlation between cropland water balance and precipitation can be identified (r=0.85), indicating that precipitation has been a dominant factor affecting cropland water balance. The correlations of cropland water balance with the maximum and minimum temperature are less significant, particularly the latter. Cropland water balance is also closely related with evapotranspiration (r=-0.88), demonstrating the impact of climate change on cropland water balance.
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    Study on Spatial and Temporal Variation of Water Surplus and Deficiency in Yellow River Basin
    SHI Jian-guo, YAN Chang-rong, HE Wen-qing, LIU Ke-li
    2008, 23 (1):  113-119.  doi: 10.11849/zrzyxb.2008.01.013
    Abstract ( )   PDF (838KB) ( )   Save
    The water surplus and deficiency (WSD) was calculated with precipitation and reference crop evapotranspiration which were calculated with Penman-Monteith method recommended by FAO in 1990,based on climatic data of 93 meteorological stations in the Yellow River Basin(YRB) authorized by the National Climatic Bureau from 1957 to 2001. Meanwhile, the WSD distribution map of the YRB was also generated through the Kriging method. The result shows the spatial distribution of WSD is strongly affected by climatic and geographical factors,and WSD decreases from north to south in the YRB,and from northwest to southeast in the northern part of the YRB. From 1957 to the end of the 1990s,the WSD presented an increasing trend. At the same time,the seasonal variation of WSD was obvious,being more obvious in spring and summer but less in winter and autumn, and with distinct regional variation.
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    Changes of Pan Evaporation and Its Impact Factors in Middle Reaches of the Yarlung Zangbu River over Tibet in Recent 25 Years
    DU Jun, HU Jun, LIU Yi-lan, BAO Jian-hua, LHAK Pa
    2008, 23 (1):  120-126.  doi: 10.11849/zrzyxb.2008.01.014
    Abstract ( )   PDF (323KB) ( )   Save
    Using the data of monthly 20cm pan evaporation and its impact climatic factors(for instance, sunshine duration, wind speed, relative humidity, precipitation and daily temperature, et al.)at 14 meteorological stations in middle reaches of the Yarlung Zangbu River over Tibet from 1981 to 2005,the variations of annual and seasonal pan evaporation and the trend were analyzed by using the method of linear trend analysis. Main results were as follows:(1)Significant negative trend of annual pan evaporation were detected at the most stations, and the mean rate of decrease was 109.92 mm /10a (99% confidence level),especially in summer (-51.79 mm /10a, 99% confidence level). In terms of spatial distribution, the trend of annual pan evaporation increased in Milin county where the rate of increase was 41.22 mm /10a (95% confidence level),but the decreasing trends were found at the other stations,the rate of decrease was (1.23~348.68) mm/10a, which is obvious in Gongga county. (2)Significant negative trends of annual sunshine duration and wind speed were found in middle reaches of the Yarlung Zangbu River over Tibet. Significant positive trends of annual mean relative humidity and precipitation were detected. Significant increasing trend of annual mean temperature was detected, an increase of 0.33℃/10a. While the increasing trend of annual mean minimum temperature(0.52℃/10a)was higher than that of annual mean maximum temperature(0.27℃/10a), and the decreasing trend of daily temperature was significant(-0.29℃/10a).(3)It is thus obvious that the decrease of annual pan evaporation was mainly caused by the significant decrease of the annual sunshine duration and wind speed as well as obvious increase of annual mean relative humidity, the daily temperature and precipitation may also play an important role in an unknown mechanism.
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    The Evaluation of Groundwater for the Water Source of Wuhai Thermoelectric Plant in Inner Mongolia
    SHAO Ai-jun, CHEN Yu-xia, YANG Jian-xun, LI Wen-mei
    2008, 23 (1):  127-135.  doi: 10.11849/zrzyxb.2008.01.015
    Abstract ( )   PDF (592KB) ( )   Save
    Based on the analsis of the hydrogeological conditions of the survey region, the groundwater recharge and discharge quantity is calculated with water balance method. The result of calculation is negative balance. After groundwater mining, the water source being mainly from the increased recharge of the Yellow River. The pumping test and the numerical simulation show that the increased recharge of the Yellow River is 3.45×104m3/d. According to water level forecast, after the water source being developed for 20 years or for 2 years running under adverse hydrological and meteorological conditions, the lowering of both water level is less than one-tenth of the aquifer thickness. This indicates that a mining rate of 3×104m3/d is assured which can satisfy the water supply demand of the thermoelectric plant.
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    A Daily Precipitation Grid Dataset with 0.1°Resolution in Changjiang River Valley and Its Precision
    HU Jiang-lin, ZHANG Ren-he, NIU Tao
    2008, 23 (1):  136-149.  doi: 10.11849/zrzyxb.2008.01.016
    Abstract ( )   PDF (1102KB) ( )   Save
    A spatial interpolation by combining the Barnes scheme and precipitation frequency is developed according to daily rainfall characteristics. With the interpolation, a daily grid precipitation dataset, which covers a domain ranging from 99° to 123°E and 24° to 36°N and has a 0.1 longitudinal and latitudinal resolution, is obtained by utilizing daily precipitation data of basic observation stations in China and ordinary observation stations in 15 provinces in the vicinity of the Changjiang valley during 1971 to 2005. The error estimation of the grid dataset is accessed through cross-validation statistics. The statistics show the combining scheme for daily precipitation interpolation is not only with small mean biased error, mean absolute error and mean square error as well as high correction coefficient, but also close to the observation variation and frequency. The primary analysis indicates that the datasets provide a finer precipitation distribution. And the years with the greatness (smallness) of the annual area precipitation, in particularly the summertime area precipitation, correspond to the distinguished flooding (drought) processes occurred in the Changjiang valley. So the daily precipitation datasets can be applied to meteorology and relative field with realistic, continuum grid data.
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    Study on Remote Sensing Quantitative Model of Suspended Sediments in the Coastal Waters of Fujian
    ZHANG Chun-gui, ZHANG Xing, CHEN Min-yan, PAN Wei-hua, ZENG Yin-dong
    2008, 23 (1):  150-160.  doi: 10.11849/zrzyxb.2008.01.017
    Abstract ( )   PDF (948KB) ( )   Save
    On the basis of analysis of MODIS data reflected spectrum characteristics on ocean, the remote sensing parameters of suspended sediments have been marked by selecting MODIS available channels in this paper,and the relevant inversion model of quantitative remote sensing data monitoring for suspended sediments has been established with ocean color data measured from nine stations on Fujian coastal waters in 2003-2004.The suspended sediment concentration on the coastal waters of Fujian in 2001-2005 has been calculated by using the quantitative remote sensing inversion model which has been established,and according to calculation results the characteristics of the spatial distribution and variation of suspended sediments concentration have been analyzed in the same region,specially,the movement characteristics of suspended sediments in Minjiang River estuary have been analyzed. The results indicate that the relationship between the suspended sediment concentration in the coastal waters of Fujian and the remote sensing parameters of suspended sediments based on MODIS blue(0.438-0.448μm) and green(0.545-0.565μm) channel data show exponential function,and the remote sensing quantitative model has gained a good effect and high accuracy,and can fulfill the quantitative survey of the distribution and variation of suspended sediments in the coastal waters of Fujian. Finally,the results will be considered as a basis for further research in this region.
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    Study on Distribution and Driving Forces of Sea Reclamation Using Remote Sensing PCA in Xiamen City
    LI Yu, LI Yang-fan, ZHU Xiao-dong
    2008, 23 (1):  161-169.  doi: 10.11849/zrzyxb.2008.01.018
    Abstract ( )   PDF (823KB) ( )   Save
    Based on Principal Component Analysis (PCA) for remote sensing image, a new method was applied into identifying the spatio-temporal distribution of sea reclamation quickly and exactly. Taking Xiamen City as an example, the combinations of Remote Sensing Images, 1993 and 1996, 1996 and 1998, 1998 and 2001, 2001 and 2003, and 2003 and 2006, were identified by PCA approach for the distribution of sea reclamation in the above five periods. In order to study the driving factors of sea reclamation at different development stages of Xiamen City, several indicators such as population, throughput of sea ports, gross industrial output value, etc. were chosen into the regress equation of the driving forces. As a result, the policy of city development, rapid industrialization and rapid increase of population are the main driving factors of sea reclamation in Xiamen City. Consequently, Strategy Environmental Impact Assessment of urban policy, Sea Area Utilization Demonstration and Payment were advised for the government to governing the sea reclamation activities.
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    Research on Delimitation of Environmentally Sensitive Area in Suzhou City
    WANG Bo, ZHAO Hai-xia, HUANG Tian-song
    2008, 23 (1):  170-176.  doi: 10.11849/zrzyxb.2008.01.019
    Abstract ( )   PDF (368KB) ( )   Save
    Along with the industrialization and the urbanization process,the human being's activities of developments and constructions turned to the environmentally sensitive area unceasingly,which has created many environment negative problems against regional sustainable development.In view of the different types of characteristics regions, the classification to environmentally sensitive area, and clear distinction of the boundaries between the future regional development and protection,are of vital practical significance to the realization of the regional economic sustainable development.From the safeguard and support capacity of environmentally sensitive area to economic development and the importance of ecological function protected area of Suzhou City,the environmentally sensitive area of the city will be divided into the ecological sensitive area,surface water source sensitive area,contaminated sensitive area,high quality farmland sensitive area as well as the latent disaster sensitive area, five kinds in all.The defination of its spatial distribution can be testified from this contest,which has provided the theoretical basis for municipal building land expansion control,resource management and ecological protection.
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