JOURNAL OF NATURAL RESOURCES >
Response of land use change to human activities in the Yellow River Basin based on water resources division
Received date: 2018-08-28
Request revised date: 2018-12-17
Online published: 2019-02-28
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Land use change analysis at different periods has been very helpful for resource management and essential trends detection through time. In order to understand the changes of land use, we examine the level of land use and the strength of human activities on land use in the Yellow River Basin in recent years. Based on the analysis of the change of land use area in the study area, according to secondary divisions of water resources, importance index of land use change (Ci), proportion of land use change area (D) and vegetation index of forest and grassland (R) were used to analyze the direction and degree of land use change in eight regions of Yellow River Basin during 1980-2015. It is found that land use in this basin underwent significant changes in the 35 years. The intensity of land changes in the Hekouzhen-Longmen section of the Yellow River Basin was the most intense. Although the degree of change in the eight sub-regions was relatively small, the absolute change area was large. The speed and degree of land use change were studied in four periods of 1980-1990, 1990-2000, 2000-2010 and 2010-2015 by using single land use dynamic degree, comprehensive land use dynamic degree and land use degree. The results showed that compared with 1980, the area of built-up land and water changed significantly. By analyzing the rate of single land use change in different periods, the rate of desert and unused land, water and urban and rural industrial and residential land changed significantly. The other three types of land use were not noticeable because of larger base area. In terms of the study periods, the change rate during 2010-2015 was the highest, and presented an increasing trend over time. Through the analysis of land use change rate, there was an increasing trend in all the eight regions; however the increasing trend in Longyangxia region was the most obvious. Except Longyangxia and Huayuankou water resources divisions, the comprehensive index of land use degree in the entire Yellow River basin ranged from -2 to 2 from 1980 to 2015, indicating that the comprehensive level of land use in each division did not change much in this period. From this perspective, human activities have less impact on land use. The reason for this result is that the entire area of the Yellow River Basin is too large, and the areas with intense human activities are only distributed in densely populated towns and plains. In the 35-year period, human activities did not have a profound impact on forests, grasslands, and deserts.
ZHANG Ran , WANG Yi-min , CHANG Jian-xia , LI Yun-yun . Response of land use change to human activities in the Yellow River Basin based on water resources division[J]. JOURNAL OF NATURAL RESOURCES, 2019 , 34(2) : 274 -287 . DOI: 10.31497/zrzyxb.20190205
Fig. 1 Secondary divisions of water resources in the Yellow River Basin图1 黄河流域水资源二级分区 |
Table 1 The area and change of various types of land use in the Yellow River Basin表1 黄河流域各地类面积及变化 |
土地利用类型 | 面积/万km2 | 2015年比1980年 增加或减少/万km2 | 增加或减少占1980年比/% | ||||
---|---|---|---|---|---|---|---|
1980年 | 1990年 | 2000年 | 2010年 | 2015年 | |||
林地 | 10.2240 | 10.1910 | 10.2090 | 10.4630 | 10.5290 | 0.3054 | 2.99 |
沙漠及未利用地 | 5.9933 | 5.9657 | 5.9248 | 6.0306 | 6.8204 | 0.8271 | 13.80 |
城乡工矿居民用地 | 1.3410 | 1.3556 | 1.4918 | 1.6596 | 2.0204 | 0.6794 | 50.66 |
水域 | 2.1487 | 2.0099 | 1.9652 | 2.0200 | 1.3432 | -0.8055 | -37.49 |
草地 | 38.7160 | 38.7900 | 38.5210 | 38.3900 | 37.7290 | -0.9875 | -2.55 |
耕地 | 21.0490 | 21.1600 | 21.3600 | 20.9100 | 21.0300 | -0.0190 | -0.09 |
Fig. 2 The value of main land change types in different water resources divisions图2 不同水资源分区主要土地变化类型值 |
Fig. 3 The D and R value of different water resources divisions in the Yellow River Basin图3 不同水资源分区D值和R值 |
Fig. 4 Change rate of land use types in the Yellow River Basin in different periods图4 不同时期各水资源分区的土地利用类型变化速度 |
Table 2 Comprehensive dynamic degree of land use in 4 different regions of the Yellow River Basin表2 黄河流域各分区4个时期土地利用综合动态度 |
分区 | 土地利用综合动态度 | ||||
---|---|---|---|---|---|
1980-1990年 | 1990-2000年 | 2000-2010年 | 2010-2015年 | ||
I龙羊峡以上 | 2.20 | 1.91 | 2.65 | 63.29 | |
II龙羊峡—兰州 | 0.36 | 1.29 | 0.96 | 27.84 | |
III兰州—河口镇 | 1.78 | 2.03 | 2.56 | 8.77 | |
IV内流区 | 1.46 | 1.92 | 4.02 | 18.02 | |
V河口镇—龙门 | 1.13 | 2.50 | 3.87 | 24.49 | |
VI龙门—三门峡 | 4.09 | 3.02 | 1.62 | 12.83 | |
Ⅶ三门峡—花园口 | 13.64 | 8.63 | 5.30 | 10.87 | |
Ⅷ花园口以下 | 4.04 | 7.11 | 4.15 | 24.37 |
Table 3 Land use change in different regions of the Yellow River Basin in 4 periods and comprehensive index of land use in 2015表3 黄河流域各分区四个时期土地利用程度综合指数变化及2015年土地利用程度综合指数 |
分区 | 土地利用程度综合指数变化 | 2015年综合指数 | |||
---|---|---|---|---|---|
1980-1990年 | 1990-2000年 | 2000-2010年 | 2010-2015年 | ||
Ι龙羊峡以上 | 0.12 | 0.00 | -0.47 | -3.90 | 186.29 |
Ⅱ龙羊峡—兰州 | -0.15 | 0.49 | -0.16 | -1.40 | 210.80 |
Ⅲ兰州—河口镇 | 0.52 | 0.78 | 0.44 | 1.78 | 219.60 |
Ⅳ内流区 | -0.36 | -0.03 | -1.23 | 0.76 | 178.77 |
Ⅴ河口镇—龙门 | 0.45 | 0.89 | -1.12 | 1.74 | 226.83 |
Ⅵ龙门—三门峡 | 0.18 | 0.65 | -0.24 | 0.66 | 250.77 |
Ⅶ三门峡—花园口 | -0.12 | 1.31 | -0.12 | 0.37 | 249.19 |
Ⅷ花园口以下 | 0.83 | 3.04 | 0.66 | -1.76 | 291.80 |
The authors have declared that no competing interests exist.
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