Acta Geographica Sinica ›› 2019, Vol. 74 ›› Issue (9): 1835-1852.doi: 10.11821/dlxb201909010
• Land Use and Ecological Environment • Previous Articles Next Articles
LIU Wenchao1,2,LIU Jiyuan1(),KUANG Wenhui1
Received:
2018-11-09
Revised:
2019-07-27
Online:
2019-09-25
Published:
2019-09-25
Contact:
LIU Jiyuan
E-mail:liujy@igsnrr.ac.cn
Supported by:
LIU Wenchao, LIU Jiyuan, KUANG Wenhui. Spatiotemporal patterns of soil protection effect of the Grain for Green Project in northern Shaanxi[J].Acta Geographica Sinica, 2019, 74(9): 1835-1852.
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Tab. 1
National classification system of soil erosion
一级类型 | 二级类型 | 强度等级 |
---|---|---|
1 水力侵蚀 | 11 面蚀 | 111微度 112轻度 113中度 |
114强度 115极强度 116剧烈 | ||
12 沟蚀 | 121微度 122轻度 123中度 | |
124强度 125极强度 126剧烈 | ||
2 风力侵蚀 | 20 不作亚类划分 | 201微度 202轻度 203中度 |
204强度 205极强度 206剧烈 | ||
3 冻融侵蚀 | 30 不作亚类划分 | 301微度 302轻度 303中度 |
304强度 | ||
4 重力侵蚀 | 40 不作亚类划分 | 不作强度分级 |
5 人为侵蚀 | 50 不作亚类划分 | 不作强度分级 |
Tab. 3
The validation of soil erosion from RUSLE model
侵蚀分级 | 理论值 (t/hm2) | 验证点 (个) | 模拟值在理论值 范围内的点(个) | 判对率 (%) | 2005年模型模拟 均值(t/hm2) |
---|---|---|---|---|---|
微度侵蚀 | < 10 | 50 | 38 | 76.00 | 7.89 |
轻度侵蚀 | 10~25 | 46 | 33 | 71.74 | 17.90 |
中度侵蚀 | 25~50 | 56 | 39 | 69.64 | 37.29 |
强度侵蚀 | 50~80 | 46 | 28 | 60.87 | 61.61 |
极强度侵蚀 | 80~150 | 50 | 37 | 74.00 | 89.43 |
剧烈侵蚀 | ≥ 150 | 73 | 38 | 52.05 | 123.42 |
Tab. 6
Soil erosion modulus with "Grain for Green" in northern Shaanxi during 2000-2010
类型变化 | 全区 | 延安地区 | 榆林地区 | |||
---|---|---|---|---|---|---|
土壤侵蚀量(万t) | 比例*(%) | 土壤侵蚀量(万t) | 比例*(%) | 土壤侵蚀量(万t) | 比例*(%) | |
耕地→林地 | -217.11 | -43.91 | -129.05 | -43.18 | -88.06 | -45.02 |
耕地→草地 | -654.29 | -48.51 | -391.28 | -47.93 | -263.01 | -49.39 |
耕地→水域 | -0.26 | -24.49 | -0.10 | -33.99 | -0.16 | -20.94 |
耕地→建设用地 | -13.84 | -38.31 | -7.57 | -43.10 | -6.28 | -33.79 |
耕地→未利用地 | -0.40 | -28.14 | -0.19 | -25.72 | -0.21 | -30.75 |
耕地减少合计 | -885.90 | -47.08 | -528.18 | -46.59 | -357.71 | -47.82 |
Tab. 7
Variation of soil erosion amount from “Grain for Green” in northern Shaanxi between 2010 and 2013
类型变化 | 全区 | 延安地区 | 榆林地区 | |||
---|---|---|---|---|---|---|
土壤侵蚀量(t) | 比例*(%) | 土壤侵蚀量(t) | 比例(%) | 土壤侵蚀量(t) | 比例*(%) | |
耕地→林地 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
耕地→草地 | -45.50 | -51.98 | 0.00 | 0.00 | -45.50 | -51.98 |
耕地→水域 | -295.72 | -7.24 | -44.67 | -4.67 | -251.05 | -8.02 |
耕地→建设用地 | -2162.13 | -15.32 | 130.87 | 3.05 | -2293.00 | -23.35 |
耕地→未利用地 | 1880.37 | 10.26 | -193.36 | -43.39 | 2073.73 | 11.59 |
耕地减少合计 | -622.97 | -1.70 | -107.17 | -1.88 | -515.81 | -1.67 |
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