Benefit Assessment of Soil and Water Conservation from Cropland to Forest in Hilly Loess Plateau at Qinghai
The information of slope and vegetation coverage of the monitoring region were extracted, based on DEM (Digital Evaluation Model) and Spot5 Satellite data images, and fishnet grid was generated using GIS (Geographic Information System) and RS (Remote Sensing) technique. Applying the information of slop and vegetation coverage layers into the corresponding space grid by using the function of zonal statistics and analysis, it can realize overlay analysis based on Standards for Classification and Gradation of Soil Erosion ( SL190-2007). and obtains the map of soil erosion intensity of the monitoring region. Finally, according to Specifications for Assessment of Forest Ecosystem Services (LY/T1721-2008) and monitoring data of typical plot, the soil and water conservation value from cropland to forest was evaluated quantitatively in 2009. The results showed that the area, on and below the moderate level. was 93600 ha, taking up 50.03％ of total conversion of farmland to forest area (185100 ha), which indicates a 14.64 million (t/a) of soil conversion, and a 1520 million Yuan for erosion control. The results of the study showed that the soil and water conservation was very effective.
hilly loess plateau conversion of cropland to forest soil and water conservation
Chuanchuan Zhao Ninggui Yang Zhen Wang Sili Liu Xu Dong Wenrong Xin
College of Resources & Environment,Shaanxi University of Science and Technology, Xian 710021, China Qinghai Provincial Forest Inventory and Planning Institute,Xining 810008,China
国际会议
西安
英文
279-283
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）