摘要
以黄河流域内蒙古片为例 ,利用TM影像及有关辅助数据 ,通过遥感软件ERDASIMAGINE、GIS软件ARC/INFO ,对影像进行增强处理、格式转换、解译等处理 ,得到土壤侵蚀的数据。结果表明 ,黄河流域内蒙古片风力侵蚀 ,水力侵蚀总体上仍比较严重。风力侵蚀与水力侵蚀所占比例分别为 4 8.76 %和 2 4 .32 %。与 1990年调查数据相比表明 ,水土流失面积减少、强度降低。但仍存在“边治理、边破坏”现象。水土流失集中分布于黄土丘陵区、风沙区 ,这也是水土保持的重点区域。
Soil Erosion is the main land degradation in arid and semi-arid regions. To control soil erosion is of significance for achieving a sustainable development of agriculture and animal husbandry. The Inner Mongolia area in the Yellow River watershed is located in its middle reaches, and has an area of 1.513×105 km2 and population of 5.5962×106. It includes five main areas, i.e., the loess hilly-gully area, mountainous area, sand-drift area, arid steppe area, and plain area. In this paper, the data of soil erosion in the Inner Mongolia area in the Yellow River watershed are obtained based on the remote sensing images and other data by using the software of ARC/INFO contained in GIS and the ERDAS software of RS. The results show that the wind erosion and water erosion in Inner Mongolia are still serious, the proportions of the former and the latter are 48.76% and 24.32% respectively. Comparing with the data collected in 1990, the area of soil erosion and its intensity are reduced. However, both soil erosion control and destruction exist currently. Soil erosion occurs mainly in the loess hilly-gully areas and the sand-drift areas, and these areas are the main regions of water and soil conservation. It is suggested to take the suitable measures for controlling soil erosion in the wind-erosion areas and the water-erosion areas.
出处
《干旱区地理》
CSCD
北大核心
2003年第2期180-184,共5页
Arid Land Geography
基金
榆林黄土沙漠过渡区生态系统评价指标研究 ( 2 0 0 1BFDF0 2 4-0 5 -0 1)
