三峡库区重庆段土壤保持服务时空分布格局研究

发布时间：2018-06-09 17:50

本文选题：土壤保持 + 三峡库区重庆段　；参考：《长江流域资源与环境》2016年06期

【摘要】：土壤保持是生态系统服务与功能的重要组成,在防止土壤侵蚀、减少径流泥沙与农业面源污染等方面具有至关重要的作用。以对国家生态安全具有重要作用的土壤保持生态功能区——三峡库区重庆段为研究区域,研究得到了2000~2013年时间序列区域土壤保持服务"流量"结果,结果表明:(1)三峡库区重庆段多年平均土壤保持量为604.39 t/hm~2·a,沿长江干流自西向东逐渐增强,区域差异显著;(2)三峡库区的土壤保持服务存在明显的垂直分异特征,随着高程的增加,以300 m与900 m为节点,出现递减-递增-递减的分段规律,与人类活动存在明显的相关关系;(3)增加森林覆被面积是改善区域土壤保持、减少水土流失的重要举措。同时,在三峡库区开展坡改梯工程,减少坡耕地的数量能够有效控制区域水土流失;
[Abstract]:Soil conservation is an important component of ecosystem services and functions, which plays an important role in preventing soil erosion, reducing runoff and sediment and agricultural non-point source pollution. Taking the Chongqing section of the three Gorges Reservoir area, which plays an important role in the national ecological security, as the study area, the results of "flow" of soil conservation service in the time series from 2000 to 2013 are obtained. The results show that the average soil conservation amount in Chongqing section of the three Gorges Reservoir area is 604.39 t/hm~2 a, and the soil conservation service in the three Gorges Reservoir area increases gradually from west to east along the Yangtze River, with significant regional differences. The soil conservation service in the three Gorges Reservoir area has obvious vertical differentiation characteristics, and with the elevation increasing, the soil conservation service in the three Gorges Reservoir area has obvious vertical differentiation characteristics. Taking 300m and 900m as nodes, there is a segmental law of decrement, increment and decline, which has obvious correlation with human activities. Increasing forest cover area is an important measure to improve regional soil conservation and reduce soil erosion. At the same time, to reduce the amount of sloping farmland can effectively control the water and soil loss in the three Gorges Reservoir area.
【作者单位】：重庆师范大学三峡库区地表过程与环境遥感重庆市重点实验室;重庆师范大学GIS应用研究重庆市高校重点实验室;华东师范大学城市化生态过程与生态恢复上海市重点实验室;
【基金】：国家自然科学基金(41271411) 科技基础性工作专项项目(2011FY110400) 重庆市基础与前沿研究计划项目(cstc2014jcyj A90012) 重庆市教委科学技术研究项目(KJ130625) 城市化生态过程与生态恢复上海市重点实验室开放基金~~
【分类号】：S15

【相似文献】