The Impact of the Grain for Green Project on the Land Use/Cover Change in the Northern Farming-pastoral Ecotone, China —A Case Study of Kezuohouqi County
Received date: 2011-04-02
Request revised date: 2011-07-05
Online published: 2012-04-20
Copyright
Based on remote sensing techniques, the land use/cover information between 1980 and 2010 was obtained and the change processes of land use/cover and landscape pattern of Kezuohouqi County in the loess plateau, China were characterized, using the statistical models to analyze the impacts of the Grain for Green Project (GGP) on both of them. The land was generally in quasi-balanced status with a slight difference between the loss and the gain of the area for most land use types, indicating that the land conversion direction was dominated by two-way transition. Transition between cropland and grassland dominated the processes of the land use/cover change and landscape pattern dynamics. The GGP together with other eco-restoration projects reversed the decline trend of natural vegetation (i.e., the woodland and grassland) and the increase trend of cropland and unused land, and reduced the fragmentation of landscape. These changes may be beneficial to the local eco-restoration.
ZHOU De-cheng , ZHAO Shu-qing , ZHU Chao . The Impact of the Grain for Green Project on the Land Use/Cover Change in the Northern Farming-pastoral Ecotone, China —A Case Study of Kezuohouqi County[J]. SCIENTIA GEOGRAPHICA SINICA, 2012 , 32(4) : 442 -449 . DOI: 10.13249/j.cnki.sgs.2012.04.442
Fig. 1 Geographical location of the study area图1 研究区位置 |
Table 1 Data sources for land use/cover classification表1 土地利用/覆被分类数据源 |
TM轨道号(列/行) | 采集时间(年-月-日) | ||||
---|---|---|---|---|---|
119/30 | 1979-08-14 | 1991-08-24 | 2001-08-11 | 2005-09-07 | 2010-10-07 |
120/30 | 1980-06-26 | 1988-09-23 | 2001-09-03 | 2005-09-14 | 2010-09-12 |
Fig. 2 Land use/ land cover pattern in Kezuohouqi resulting from the integration of supervised classification and visual interpretation (a) and the Land use/ land cover change (b) during 1980-2010图2 科左后旗1980~2010年土地利用/覆被空间分布 |
Table 2 Area of each land use/cover category in Kezuohouqi and changes in land use/cover from 1980 to 2010表2 科左后旗土地利用/覆被类型面积及变化 |
土地利用/覆被类型 | 耕地 | 林地 | 草地 | 建设用地 | 水体 | 未利用地 | 综合变化 | |
---|---|---|---|---|---|---|---|---|
面积(km2) | 1980年 | 1348.43 | 668.35 | 8367.80 | 38.97 | 180.70 | 995.07 | — |
1990年 | 2289.93 | 473.11 | 7413.87 | 61.14 | 146.83 | 1214.45 | — | |
2000年 | 3192.35 | 645.07 | 5752.91 | 100.45 | 138.71 | 1769.82 | — | |
2005年 | 2872.13 | 749.02 | 6234.84 | 111.28 | 167.81 | 1464.24 | — | |
2010年 | 2558.66 | 1115.69 | 6746.05 | 125.60 | 145.66 | 907.66 | — | |
1980~1990年 | 面积变化(km2) | 941.50 | -195.25 | -953.93 | 22.17 | -33.87 | 219.38 | — |
净变化(%) | 69.82 | -29.21 | -11.40 | 56.89 | -18.74 | 22.05 | 10.20 | |
总变化(%) | 108.12 | 36.70 | 28.91 | 111.66 | 73.18 | 99.47 | 22.79 | |
趋势 | 0.65 | -0.80 | -0.39 | 0.51 | -0.26 | 0.22 | 0.45 | |
净变化速度(%) | 5.44 | -3.40 | -1.20 | 4.61 | -2.05 | 2.01 | 0.98 | |
1990~2000年 | 面积变化(km2) | 902.42 | 171.96 | -1660.96 | 39.31 | -8.12 | 555.37 | — |
净变化(%) | 39.41 | 36.35 | -22.40 | 64.30 | -5.53 | 45.73 | 14.39 | |
总变化(%) | 110.90 | 147.86 | 37.11 | 75.33 | 83.38 | 120.36 | 37.16 | |
趋势 | 0.36 | 0.25 | -0.60 | 0.85 | -0.07 | 0.38 | 0.39 | |
净变化速度(%) | 3.38 | 3.15 | -2.50 | 5.09 | -0.57 | 3.84 | 1.35 | |
2000~2005年 | 面积变化(km2) | -320.22 | 103.95 | 481.93 | 10.83 | 29.10 | -305.58 | — |
净变化(%) | -10.03 | 16.11 | 8.38 | 10.78 | 20.98 | -17.27 | 5.40 | |
总变化(%) | 31.00 | 85.70 | 28.93 | 11.48 | 66.36 | 48.46 | 19.34 | |
趋势 | -0.33 | 0.19 | 0.29 | 0.94 | 0.32 | -0.36 | 0.28 | |
净变化速度(%) | -2.09 | 3.03 | 1.62 | 2.07 | 3.88 | -3.72 | 1.06 | |
2005~2010年 | 面积变化(km2) | -313.46 | 366.67 | 511.20 | 14.32 | -22.15 | -556.58 | — |
净变化(%) | -10.91 | 48.95 | 8.20 | 12.87 | -13.20 | -38.01 | 7.69 | |
总变化(%) | 25.54 | 89.83 | 22.03 | 13.42 | 58.04 | 76.84 | 17.32 | |
趋势 | -0.43 | 0.54 | 0.37 | 0.96 | -0.23 | -0.49 | 0.44 | |
净变化速度(%) | -2.28 | 8.30 | 1.59 | 2.45 | -2.79 | -9.12 | 1.49 | |
1980~2010年 | 面积变化(km2) | 1210.23 | 447.34 | -1621.75 | 86.63 | -35.04 | -87.41 | — |
净变化(%) | 89.75 | 66.93 | -19.38 | 222.31 | -19.39 | -8.78 | 15.04 | |
总变化(%) | 172.64 | 214.72 | 50.48 | 241.27 | 87.21 | 133.06 | 41.22 | |
趋势 | 0.52 | 0.31 | -0.38 | 0.92 | -0.22 | -0.07 | 0.36 | |
净变化速度(%) | 2.16 | 1.72 | -0.72 | 3.98 | -0.72 | -0.31 | 0.47 |
Fig. 3 Characteristics of the landscape in Kezuohouqi between 1980 and 2010图3 科左后旗1980~2010年景观的总体特征 |
Fig. 4 Formational characteristic and spatial structure of the landscape in Kezuohouqi between 1980 and 2010图4 科左后旗1980~2010年的景观空间结构与构型特征 |
The authors have declared that no competing interests exist.
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