Quantitative Assessment of Soil Erosion in Areas Under Grain for Green Project in Loess Plateau of Northern Shaanxi Province Based on GIS and RS

WANG Juan; ZHUO Jing

doi:10.13961/j.cnki.stbctb.2015.01.041

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Quantitative Assessment of Soil Erosion in Areas Under Grain for Green Project in Loess Plateau of Northern Shaanxi Province Based on GIS and RS

- Quantitative Assessment of Soil Erosion in Areas Under Grain for Green Project in Loess Plateau of Northern Shaanxi Province Based on GIS and RS
- Bulletin of Soiland Water Conservation Vol. 35, Issue 1, Pages: 220-223(2015)
- 作者机构：
  
  陕西省农业遥感信息中心,陕西,西安,710014
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.01.041
  CLC：
- Published：2015
- 稿件说明：
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WANG Juan, ZHUO Jing. Quantitative Assessment of Soil Erosion in Areas Under Grain for Green Project in Loess Plateau of Northern Shaanxi Province Based on GIS and RS[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 220-223.
DOI：

WANG Juan, ZHUO Jing. Quantitative Assessment of Soil Erosion in Areas Under Grain for Green Project in Loess Plateau of Northern Shaanxi Province Based on GIS and RS[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 220-223. DOI： 10.13961/j.cnki.stbctb.2015.01.041.

摘要

[目的

]

分析陕北黄土高原退耕还林区2000

2007和2012年土壤侵蚀量时空变化特征

为该地区开展退耕还林(还草)工程提供参考。[方法

]

在GIS和RS的技术支持下

以陕北黄土高原退耕还林区为研究区域

应用美国通用土壤流失预报方程(RUSLE模型)为评价模型

利用ArcGIS 9.2的栅格数据空间分析功能

对研究区域2000

2007和2012年土壤侵蚀强度进行了估算

在此基础上分析了其时空变化特征。[结果

]

陕北黄土高原退耕还林区2000-2012年土壤侵蚀量呈下降趋势

2012年较2000年下降了1162 t/(km

·a);以子长县为例

2000年土壤侵蚀模数在2500 t/(km

·a)以下的面积仅占区域总面积的0.1%

2012年上升为55.2%;2000年研究区主要土壤侵蚀强度为中度侵蚀

2012年为轻度侵蚀

变化剧烈的区域主要集中在黄土高原丘陵沟壑区的子长、安塞、志丹等县。[结论

]

植被覆盖因子是影响区域内土壤侵蚀的最主要因素

由此可见大力开展退耕还林(还草)工程可以有效抑制区域内土壤侵蚀状况。

Abstract

[Objective] To analyze the temporal and spatial variability of soil erosion intensity in Loess Plateau of Northern Shaanxi Province in 2000

2007 and 2012

and to provide the support for the implementation of grain for green project in this region.[Methods] With the support of GIS and RS technology

we conducted a quantitative research based on the RUSLE model and ArcGIS 9.2 and analyzed the temporal and spatial variability of soil erosion intensity in Northern Shaanxi in 2000

2007 and 2012.[Results] During the 13 years

soil erosion tended to decrease over time

and the soil erosion in 2012 dropped by 1 162 t/(km2·a) compared with 2000. Compared with the 2% of the total area in 2000

the area with an erosion modulus less than 2 500 t/(km2·a) in Zichang County accounted for 26% in 2012. The soil erosion was moderate in 2000

but was slight in 2012 in most areas. The drastic change mainly occurred in the hilly areas in Zichang

Ansai and Zhidan Counties.[Conclusion] Vegetation coverage was the main factor affecting the soil erosion

and conversion of slope cropland to forest or pasture is playing an important role in decreasing soil loss.

关键词

Keywords

references

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