Table of Content

    20 January 2012, Volume 27 Issue 1 Previous Issue    Next Issue
    Resources Utilization and Management
    Sustainable Development and Management of Coastal Tourism Resources under the Background of Global Change
    WANG Fang, ZHU Da-kui
    2012, 27 (1):  1-16.  doi: 10.11849/zrzyxb.2012.01.001
    Abstract ( )   PDF (642KB) ( )   Save
    Global change is a generally accepted scientific fact which is highly possibly induced by human activities and impacts tourism development. The transportation system especially the aviation consumed by tourists and the accommodation facilities in coastal destinations releases massive greenhouse gases and contributes to global change. The ocean is very important to the human society and economy, and coastal tourism is one of the main human activities occurred in the coastal zone. Coastal tourism is also the most traditional, the fastest growing and major form of tourism which is the world's largest industrial (group) now. Coastal tourism resources are rich in China, and coastal tourism plays a decisive role in the marine economy.Sustainable tourism is to satisfy the need of tourist and local community and strengthen the protection of environment and chances of future development at the same time. Hence it is suggested analyze the problems and challenges during the development of coastal tourism resources under the background of global change, and identify the key factors for the future ecological friendly coastal tourism resource development and management under the framework of sustainable development, and for the dynamic model building and the decision making. Change the pattern and products of coastal tourism to develop low carbon coastal tourism based on the idea of "green thinking". Pay more attention to developments of creative tourism products such as ecotourism and alternative tourism. Change the way of coastal tourism resource utilization by developing low carbon coastal tourism, advocating carbon emission reduction, promoting carbon compensation and carbon economy, and encouraging new energy saving technology application. Take stakeholders' collaboration into account which includes encouraging the community involvement, balancing the stakeholders' benefits and interests when concerning coastal tourism resource development, especially the local communities', tourists' and governments' way of looking at, attitudes, sense of responsibility and consensus to global change is of vital importance. All the measures should be taken into account and optimized in the process of planning-management-monitoring-evaluation in the dynamic model. Due to the limited available data of the coastal tourism resource development and management under the background of global change, part of the reference data is from the whole tourism research results which are the shortcomings of the research. Considering the continuous attention and thorough research on global change and the status and importance of the coastal tourism resource development and management in the tourism industry, the related research should be strengthened and further spread.
    References | Related Articles | Metrics
    Discovering the Knowledge of Tree Species Distribution Based on GIS in Shimian County of Sichuan Province, China
    YANG Cun-jian, WANG Qin, WU Gui-shu, REN Ping, NI Jing
    2012, 27 (1):  17-24.  doi: 10.11849/zrzyxb.2012.01.002
    Abstract ( )   PDF (499KB) ( )   Save
    Discovering knowledge from spatial database is an important aspect for GIS application study. Discovering tree species distribution knowledge and relationship knowledge from spatial database were discussed in Shimian County of Sichuan Province based on GIS. The forest resource data were used to create GIS database, from which the tree species layer was extracted. The raster database with the resolution of 10 m including DEM, annual accumulative temperature above 10 ℃ and annual precipitation were created by using GIS software. The knowledge of each tree species distribution along with the elevation, annual accumulative temperature above 10 ℃ and precipitation were discovered by the spatial overlain analysis and statistics analysis. The spatial neighborhood relationship knowledge among tree species were discovered by using the spatial topo analysis based on GIS and the tree species GIS database. The knowledge can be used for selecting suitable tree species and arranging the tree species spatial pattern in afforestation. The knowledge is also significant to the tree species interpretation in the remote sensing images. The method of knowledge discovering can also be used in other fields or other regions.
    References | Related Articles | Metrics
    Effect of Long-Term Residue Return on Soil Organic Carbon Storage
    CHEN Xian-ni, YUE Xi-jie, GE Xi-zu, WANG Xu-dong
    2012, 27 (1):  25-32.  doi: 10.11849/zrzyxb.2012.01.003
    Abstract ( )   PDF (994KB) ( )   Save
    To investigate the effect of maize residue return on soil organic carbon (SOC) maintenance, soil samples were collected from a long-term field experiment site after 21-year treatments involving three rates of residue return (9 375, 18 750, 37 500 kg·hm-2), yard manure application (37 500 kg·hm-2), chemical fertilizer and unfertilized control. The study was conducted in Guanzhong Plain on clay loam soil, classified as Eum-Orthic Anthrosols. Compared to the chemical fertilizer treatment, the low, middle and high levels of residue incorporation increased SOC storage by 12%, 24% and 41%, respectively, while 39% increase was found for yard manure application. The SOC accumulative coefficient after 21 years was about 5.6% for residue, and 7.2% for yard manure. The annual rate of SOC accumulation was 413 kg·hm-2, 265 kg·hm-2 and 155 kg·hm-2 for residue return at the high, middle and low levels, respectively, and 397 kg/hm2 for yard manure application. Residue and yard manure application reduced the oxidation stability of SOC and enhanced the energy state of humic substances, which means the decrease of SOC decomposition. The results indicate that residue return, both directly and indirectly (yard manure application), would significantly increase the SOC level relative to chemical fertilizer treatment and unfertilized control on clay loam soil with benefits for soil productivity and agricultural sustainability.
    References | Related Articles | Metrics
    Effects of Chemical Fertilizer Combined with Crushed Straw Application on Soil Evaporation of Winter Wheat
    DONG Qin-ge, FENG Hao, DU Jian
    2012, 27 (1):  33-40.  doi: 10.11849/zrzyxb.2012.01.004
    Abstract ( )   PDF (576KB) ( )   Save
    The Micro-lysimeters were employed to determine the process of soil evaporation of winter wheat at its growth stages under chemical fertilizer combined with crushed straw (S) and current chemical fertilizer (R). The effects of S on soil evaporation were investigated in the wheat field,and the differences of soil evaporation were studied among seven varieties of winter wheat. The results showed that the effects of S on soil evaporation varied to a certain degree at different growing stages. The daily soil evaporation existed the same law under S and R and the accumulative soil evaporation under S was lower than the R's. The soil evaporation of different winter wheat varieties was inhibited significantly by S, and the ratios of restraining soil evaporation ranged from 8.02% to 11.60%; the amount of evaporation about 12 mm was translated into transpiration owing to the use of S. The soil evaporation of different varieties had no obvious difference and variation.
    References | Related Articles | Metrics
    Analysis, Comparison and Choice of Tax Rate in Resource Reform
    XU Xiao-liang, XU Xue-fen
    2012, 27 (1):  41-49.  doi: 10.11849/zrzyxb.2012.01.005
    Abstract ( )   PDF (376KB) ( )   Save
    Resource tax reform is the focus of the society. Resources tax reform will be done during the twelfth Five-Year Plan, but the related research results on current domestic and international resource tax policy are lackness, especially in resource tax rate. We build a computable general equilibrium model (CGE) which consists of the functional equation in the production, consumption, income/expenditure and resource to analyze and select the resource tax rate, on the basis of SAM. In this paper, the model chooses valorem tax levy means to simulate the impact of economic and resource systems with different range of different resource tax rate settlement, by referring to expected rate range of domestic society and developed countries, through comparative analysis with the help of GAMS software. The result shows that the impact on social, economic and resources systems differs to varying degrees. In the relatively stable period of economic development, we can select tax rate ranging from 5% to 7%; at a higher level of economic development we can select an option high level of resource tax burden, such as the rate ranging from 7% to 9%; while in a fluctuations economy, we can choose a lower tax level of resources.
    References | Related Articles | Metrics
    Resources Ecology
    The Impacts of Ecological Compensation on Regional Development: A Case of the Yellow River Water Supply Areas of Gannan
    HOU Cheng-cheng, ZHAO Xue-yan, ZHANG Li, JIANG Jin-de, LI Wei, YAN Jiang-ping
    2012, 27 (1):  50-61.  doi: 10.11849/zrzyxb.2012.01.006
    Abstract ( )   PDF (424KB) ( )   Save
    As the project of ecological compensation is being put into effect at present, all kinds of impacts have been brought about objectively in the project areas, and the validity and sustainability of the project have been faced serous challenges from various factors. Therefore, its impacts evaluation is an essential prerequisite for decision-making. The fuzzy multi-criteria analysis model was constructed to assess the economic, social and environmental effects which were brought by the ecological compensation. The paper is based on a survey of 117 herd households by means of participatory rural appraisal (PRA). According to the distribution area, all survey herds were divided into three groups, the herd household of pure pasturing area, the herd household of the semi-planting-pasturing area and the agricultural area. The results are drawn as follows: 1) The overall impact of regional development level is 3.39 by ecological compensation and it belongs to moderate positive effects. The impact which was brought by the ecological compensation is different from the regional economic, social and environmental effects, being respectively 3.11, 3.58 and 3.71. 2) Because of the ecological compensation, the development of regional economy is slow. The influence of the income structure of farmers which was brought by the ecological compensation is the highest. The per capita net income of farmers and the commodity rate of farm products reduce in the pure pasturing area and semi-planting-pasturing area. 3) Because of the ecological compensation, there is no difference in environmental awareness and herds' skills. The farmers of pure pasturing area have a better sense in employment and rights consciousness; the farmers of semi-planting-pasturing area and agricultural area have a better sense in supervision awareness, participation consciousness and life quality improvement. 4) The influence of the environmental improvement which was brought by the ecological compensation is the highest, being 3.71. The farmers in pure pasturing area have a strong sense of it, followed by the semi-planting-pasturing area and agricultural area.
    References | Related Articles | Metrics
    Spatial Differences and Trend of Emergy Input and Output Indices of Planting Eco-economic System in Major Grain Producing Area: A Case of Hebei Province
    WANG Qian, JIN Xiao-bin, ZHOU Yin-kang
    2012, 27 (1):  62-73.  doi: 10.11849/zrzyxb.2012.01.007
    Abstract ( )   PDF (620KB) ( )   Save
    In order to reveal the spatial pattern of characteristics of major grain producing areas planting eco-economic system input and output emergy, and promote the changes from traditional agriculture to ecological agriculture, this paper has taken the state grain-producing area—Hebei Province as a study area. Based on emergy theory and spatial analysis techniques, it estimated the main input-output emergy indices of plantation industry of the 138 counties in Hebei Province. From the perspective of geography, this paper focused on the differences of spatial pattern of every emergy indicator and distribution trend. The results show: 1) The input and output emergy indices of planting eco-economic system showed significant geographical features. 2) The high value of emergy investment ratio (EIR) was mainly distributed in Shijiazhuang-Tangshan-Qinhuangdao, averaging 15.81, which showed large regional differences. 3) The high values of energy yield ratio (EYR) mainly distributed in the Xingtai and southeastern part of Handan, with coefficient of variation being 0.820. 4) The input and output emergy indices of planting eco-economic system showed spatial distribution of "U" type, inverted "U" type , first-order type etc. Finally, based on scientific analysis of the regional plant eco-economic system input-output emergy spatial difference characteristics, suggestions and countermeasures, such as large-scale operation, scientific adjustment of cropping structure which can improve the efficiency of emergy are proposed.
    References | Related Articles | Metrics
    The Influence of Soil Moisture and Nitrogen on Water and Nitrogen Use Efficiency of Spring Wheat
    CHEN Nian-lai, SUN Xiao-mei, ZHANG Yu-xin, ZHANG Tao, GAO Shi-ming
    2012, 27 (1):  74-81.  doi: 10.11849/zrzyxb.2012.01.008
    Abstract ( )   PDF (852KB) ( )   Save
    Three cultivars differing in drought resistance were employed to study water use efficiency (WUE) and nitrogen use efficiency (NUE) of spring wheat, and the relationship between NUE and WUE under different water and nitrogen levels. The results showed that cultivars of Heshangtou and Dingxi No.35 had higher WUE than Ningchun No.4, and Dingxi No.35 had the highest NUE. Leaf level NUE of the three cultivars decreased as nitrogen supplement increased, whole plant NUE was negatively correlated with nitrogen levels. No significant relation was found between nitrogen supplement and leaf WUE, but whole plant WUE was significantly positively correlated with nitrogen level. Obviously, the integral effect of soil water and nitrogen had an important influence on NUE of spring wheat, the response of whole plant NUE to water conditions significantly depended on nitrogen levels. Clear physiological trade-off was found between nitrogen and water use efficiency in wheat, i.e. cultivars with high water use efficiency will have low nitrogen use efficiency, and vice versa.
    References | Related Articles | Metrics
    Assessment on Ecosystem Vulnerability to Extreme Precipitation in the Upper and Middle Yangtze Valley
    YU Li, LI Ke-rang, TAO Bo
    2012, 27 (1):  82-89.  doi: 10.11849/zrzyxb.2012.01.009
    Abstract ( )   PDF (553KB) ( )   Save
    The hazards of extreme weather events are likely greater than the change of climatic mean variables under the background of climate change. The assessment on impacts and vulnerability of ecosystem to extreme events is important and realistic. The process-based model (CEVSA) was used to simulate the responses of ecosystem to extreme precipitation in the upper and middle Yangtze Valley because of its frequency of drought and flood. The net primary productivity (NPP) in summer which has high correlation with precipitation anomalies was analyzed as an indicator of ecosystem to extreme precipitation. The variability of NPP and its changing tendency were defined as the sensitivity and adaptive capacity of ecosystem to extreme precipitation, respectively, and the vulnerability of ecosystem to extreme precipitation was calculated based on them. The results suggested that most of the ecosystem was gently vulnerable and took 65% of the upper and middle Yangtze Valley during 1961-1990, and the higher vulnerable ecosystem took about 20%, mainly distributed in the northwestern part. Extreme precipitation would increase the vulnerability of ecosystem, whatever drought or flood. The main change of vulnerability was shifted from nonvulnerable state to gently vulnerable state during the extreme precipitation years. The higher vulnerable ecosystem was mainly located in the northern part of the upper and middle Yangtze Valley, and its percent was hardly changed under different extreme precipitation. Compared with the impacts of drought and flood, the vulnerability in drought years was higher than in flood years, and even it was the same in the next year of extreme precipitation. However, the ecosystem vulnerability in most part of the valley could get back to the level of multi-year mean state in the next years of extreme precipitation.
    References | Related Articles | Metrics
    Dynamic Valuation on Ecosystem Services of Dongjiang River Basin
    DUAN Jin, KANG Mu-yi, JIANG Yuan
    2012, 27 (1):  90-103.  doi: 10.11849/zrzyxb.2012.01.010
    Abstract ( )   PDF (643KB) ( )   Save
    In consideration of the temporal and spatial variations of ecosystem type, service quality and function type, this paper carried out a dynamic valuation of the ecosystem services contributed by Dongjiang River Basin in the year 2000, 2004 and 2008. Remote sensing and geographic information system(GIS) technology, as well as market value method, shadow project method, the opportunity cost method and some other methods were used in the evaluation process to reveal both the temporal and spatial variations of those ecosystem service values. The results showed that: 1) the ecosystem service values of Dongjiang River Basin were on the decline, figuring at from 159.526 billion yuan in 2000 to 155.662 billion yuan in 2008, while the average annual reduction rates were slowing down, counted at 0.57% from 2000 to 2004 and 0.04% from 2004 to 2008, respectively. 2) Compared with the ecosystem service values of per unit area of arable land, woodland, grassland, built-up area and unused land in year 2000, the values corresponding to each of the land use type in year 2008 decreased very much, implying that the ecosystem quality of Dongjiang River Basin degraded. 3) The average annual reduction rate of woodland service value per unit area from 2004 to 2008 was higher than that of from 2000 to 2004, reflecting the exceptional accelerated decline in the quality of the forest resources. 4) The spatial distribution of ecosystem service value per unit area changed from higher at the upstream and midstream areas to the lower at the downstream. However, a more dramatic decrease was observed in the upstream area.
    References | Related Articles | Metrics
    Resources Evaluation
    Comprehensive Evaluation for Soil-Water Resources Carrying Capacity in Guanzhong Area Based on Improved Set Pair Analysis
    NAN Cai-yan, SU Xiao-ling
    2012, 27 (1):  104-114.  doi: 10.11849/zrzyxb.2012.01.011
    Abstract ( )   PDF (402KB) ( )   Save
    In view of the soil-water resources carrying capacity(SWRCC)system's uncertainty, an improved set pair analysis(SPA) model is suggested that utilizing SPA theory and the malleability of the original relation degree to extend the comprehensive evaluation ranking of SWRCC from 3 levels to 5 levels. The model can be used for obtaining the SWRCC level in different cities of Guanzhong area based on 20 influential factors of SWRCC, the SWRCC factors weights are obtained by combining the subjective factor weights and entropy weights to allocate the weight more reliable. The SWRCC comprehensive evaluation results of proposed model is compared with the results of improved fuzzy comprehensive evaluation to prove the rationality of improved SPA. The results of the research firstly demonstrate that the Guanzhong SWRCC ranking at the level of Ⅲ means a basic balance except Xianyang and Weinan which were overload in 2008. Then it shows the evaluation results of improved SPA are reliable, reasonable and visualized, and the improved SPA is a scientific and practical evaluation method that can more meticulously describe the SWRCC level.
    References | Related Articles | Metrics
    Application of Approximate Entropy for Analyzing Complexity of Groundwater Depth Series in Sanjiang Plain
    LIU Dong, ZHOU Ming, MENG Jun
    2012, 27 (1):  115-121.  doi: 10.11849/zrzyxb.2012.01.012
    Abstract ( )   PDF (523KB) ( )   Save
    Influenced by high-strength agricultural exploitation, climate and so on, the system of groundwater resources has more and more taken on characteristics of complex system in Sanjiang Plain. Therefore, taking Jiansanjiang branch bureau as example, the approximate entropy is adopted to analyze the complexity of groundwater depth series in seven production teams of Jiansanjiang branch bureau. The results show the complexity order from big to small as follows:4th production team of Farm Qianjin, 69th production team of Farm Qixing, 22th production team of Farm Qianjin, 1th production team of Farm 859, 26th production team of Farm 859, 11th production team of Farm Qianjin, 21th production team of Farm 859. We can see that the groundwater exploitation is the key factor influencing groundwater dynamic variation. The research achievements reveal the essence of complex dynamic system, provide decision basis for scientifically managing groundwater resources in Jiansanjiang branch bureau so much as the entire Sanjiang Plain.
    References | Related Articles | Metrics
    Grade Classification of Tourism Affected Zone and Analysis of Relevant Indicators
    GUO Xiu-ling, SHANGGUAN Tie-liang
    2012, 27 (1):  122-131.  doi: 10.11849/zrzyxb.2012.01.013
    Abstract ( )   PDF (794KB) ( )   Save
    The Luya Mountain Nature Reserve, a well-known tourism spots, is in the northern part of Luliang Mountains in Shanxi Province. It was designated as the national AAAA level scenic area in 2010. The mountain has abundant species, various vegetation types and highly diversified habitats. This thesis selected one of the typical tourist attractions in Luya Mountain Nature Reserve, namely Bingkouwa to study the impacts of tourism on forest vegetations through the quantitative ecological methods including plant classification, principal component analysis and correlation analysis. The major studying results are as follows: 1) The TWINSPAN classification divided the area into six impact zones by the extent of tourism influences, reflecting the alternations in spatial pattern by tourism activities, where the trails were used as the axis. 2) The correlation analysis revealed significant relationships among 3 out of 12 pairs of tourism indicators, namely remove stumps influence coefficient vs. trail distance, waste impact coefficient vs. remove stumps influence coefficient, and waste impact coefficient vs. trail distance. Meanwhile the H' and slope were found well correlated. 3) The PCA analysis of 12 impact indicators showed five principal components which were closely related with seven impact indicators, accounting for 81.88% of the comprehensive information. The results of tourism affected zone level division by seven tourism impact indicators and 12 tourism impact indicators were the same. This simplifies the selection for tourism impact indicators for application purpose.
    References | Related Articles | Metrics
    Analysis on Climatic Change Trend of Cold/Warm Seasonal Characteristics in Ebinur Lake Basin from 1960 to 2006
    GUO Peng-cheng, BAO An-ming, CHEN Xi, CHEN Xiao-na, WANG Xing-juan, BAI Ze-long
    2012, 27 (1):  132-142.  doi: 10.11849/zrzyxb.2012.01.014
    Abstract ( )   PDF (839KB) ( )   Save
    The trend, periodicity and abrupt change of cold-warm seasonal and annual mean air temperatures, precipitations and sunshine duration were analyzed in Ebinur Lake Basin with methods of line analyze, annual anomalies, wavelet analyze and Mann-Kendall test during the recent 47 years. The results indicate that: The temperatures and precipitations trend is increased in Ebinur Lake Basin during 47 years, the average trends are 0.43 ℃/10 a and 12.02 mm/10 a; and the sunshine duration trend is decreased with -22.30 h/10 a. In view of the spatial distribution pattern, average annual temperature of the stations in the Ebinur Lake Basin all increases to different extent. The growth of Tuoli is the maximum and that of Wenquan is the minimum. The annual precipitation of Tuoli tends to decrease, while the annual precipitation of the other stations all increases. The decreasing of annual sunshine duration in cold season was stronger than in the warm season, which led to most stations in the study area show trends of decreasing. The time series of temperatures, precipitations and sunshine duration in cold-warm seasonal and annual all have long cycles, which contain some short ones. There are all obvious periodicity of 8 years and the long periodicity of 14 and 20 years respectively for precipitations and sunshine duration; but the time series of mean air temperatures is complex and has cycles around 11 and 22 years. The change years, which happen in the 1980s, of climate factors with methods of annual anomalies and Mann-Kendall test are identical. Along with the precipitations change from drought to rainy, the climate in the Ebinur Lake Basin became wet in 1986. The temperatures change from cold to hot in 1988. The growth of sunshine duration stopped and the total number of sunshine duration began to decrease around 1984.
    References | Related Articles | Metrics
    Temporal and Spatial Characteristics of Climate Change and Extreme Dry and Wet Events in Shiyang River Basin from 1960 to 2009
    ZHOU Jun-ju, SHI Pei-ji, SHI Wei
    2012, 27 (1):  143-153.  doi: 10.11849/zrzyxb.2012.01.015
    Abstract ( )   PDF (635KB) ( )   Save
    Based on daily meteorological data from four stations from 1960 to 2009, the article analyzes the temporal and spatial characteristics of the climate change and the extreme arid and wet events of the Shiyang River Basin, using FAO Penman-Monteith model and ArcGIS IDW interpolation. The results show: Firstly, there is an obvious increasing trend, both in the annual humid index and temperature, with the humid index trend rate of 0.006 per 10 a and the temperature 0.338℃ per 10 a, respectively. From 1960s to 2000s, the climate of Shiyang River Basin experienced three stages, namely, comparatively cold dry, cold humid and warm humid. Secondly, the warm humid trend of winter is the most obvious, followed by autumn. Thirdly, the average humid rates gradually decrease from the upper reaches to the middle and to the down reaches, while the warming rates gradually increase. Lastly, frequency of the overall trend of extreme arid events fluctuantly decreased from 1960 to 2009, especially after the 1980s. But, meanwhile, the trend of extreme wet events increased. The period of frequent occurrence of extreme events is from the 1960s to the 1970s. The occurrence of extreme arid and wet events varies in different parts of the Shiyang River Basin. The temperature and wind speed are dominant factors influencing extreme arid and wet events. The arid climatic environment of the Shiyang River Basin has improved on the background of global warming.
    References | Related Articles | Metrics
    Resources Research Methods
    China's County-Scale Ecological Regionalization
    XIE Gao-di, ZHANG Chang-shun, ZHANG Lin-bo, SU De, CAO Shu-yan, LENG Yun-fa, XIAO Yu
    2012, 27 (1):  154-162.  doi: 10.11849/zrzyxb.2012.01.016
    Abstract ( )   PDF (574KB) ( )   Save
    Three-level zoning system of domain-ecoregion-ecodistrict and top-down division method were adopted, and four domains (i.e., the northeast humid and semi-humid domain, the northern arid and semi-arid domain, the southern humid domain and the Tibet Plateau domain), 11 ecoregions and 63 ecodistricts were identified in China according to quantitative and qualitative indicators (e.g., climate, topography, ecosystem characteristics). Because this scheme pays more attention to the application of the usual name in ecoregion naming, and keeps the integrity of county border, it not only provides scientific basis for protecting, constructing and evaluating national eco-environment, but also makes eco-environmental data better integrated with socio-economic data at county scale, hence leading to more effective ecosystem management, recognizing the position of regional ecological functions and guaranteeing regional eco-security, so as to provide a scientific basis for strategic decision-making, ecological resources conservation, eco-environmental protection and construction at national or regional scale.
    References | Related Articles | Metrics
    Special Forum
    Research Progress in Soil Property Interpolators and Their Accuracy
    SHI Wen-jiao, YUE Tian-xiang, SHI Xiao-li, SONG Wei
    2012, 27 (1):  163-175.  doi: 10.11849/zrzyxb.2012.01.017
    Abstract ( )   PDF (466KB) ( )   Save
    Soil property interpolators and their accuracy are regarded as an important topic for the fields of pedometrics and "digital soil". Soil property interpolation is the quantitative monitoring method for spatio-temporal change of soil, and their accuracy is one of the important future research considerations in pedometrics. High accuracy of soil property interpolation can support technique for micro-decision of soil available use and environmental protection. This paper introduces six methods for soil property interpolation, including Kriging, IDW, Spline, Bayesian maximum entropy (BME), geographically weighted regression (GWR) and high accuracy surface modeling (HASM), and presents the validation methods and indices for soil property interpolation. Then we identify six methods for improving the performance of soil property interpolation, including selection of interpolator, setting of interpolator parameter, sampling numbers and density, degree and extent, sequence of analysis in library and combination of secondary information. Finally, we present the future research orientation of soil property interpolation from three aspects, including selection of interpolator, indices and secondary information.
    References | Related Articles | Metrics