摘要
晋北地区是典型的半干旱农牧交错区,严重的水土流失制约了当地社会经济的可持续发展。文中以晋北地区相应时期的TM影像为数据源,将GIS技术与修正通用土壤流失方程(RUSLE)结合,分析晋北地区1999、2009和2014年的土壤保持量空间分布及其变化特征,并分析土壤保持量与植被覆盖度和海拔高度的关系。结果表明:1)从空间分布来看,研究区西部和东南部的土壤保持量较高,其他地区相对较低。2)从时间上来看,研究区1999、2009和2014年的年均土壤保持量分别是10913t·km^(-2)·a^(-1)、13478t·km^(-2)·a^(-1)和11482t·km^(-2)·a^(-1)。3)研究区单位面积土壤保持量与NDVI指数呈现显著正相关。4)研究区单位面积土壤保持量与海拔高度呈现显著正相关。文中研究结果对于深入认识晋北地区水土流失特征有一定的科学意义,同时为当地水土保持和防沙治沙工作提供科学依据。
Northern area of Shanxi is a typical semi-arid farming-grazing transitional region,and its serious soil erosion and water loss have limited the sustainable development of the local economy. On the basis of the GIS and RUSLE,we took the TM images of the corresponding period as the source data to analyze the temporal and spatial distribution of the amount of soil conservation and its dynamic changes in northern area of Shanxi in 1999,2009 and 2014. We also analyzed the relation between the amount of soil conservation and the vegetation coverage as well as altitude. The results showed that：（1） The spatial distribution of soil conservation was consistent and clearly aggregate in total in 1999,2009,2014. The amount of soil conservation in west and northeast was relative higher than other areas.（ 2） The average soil conservation quantity were 10913 t · km-2·a-1,13478 t·km-2·a-1,and 11482 t·km-2·a-1 respectively in 1999,2009 and 2014. The soil conservation quantity of the 80% of the research area ranged from-2000 t·km-2·a-1 to 2000 t·km-2·a-1.（3） The amount of soil conservation per unit area was significantly and positively correlated with the NDVI index.（4） The amount of soil conservation per unit area was positively correlated with altitude. The results could be useful to reveal the characteristics of the soil erosion in northern Shanxi Province,and provide scientific reference for the soil conservation and desertification control in this area.
作者
王婷
郑帅霖
李深泉
张红
WANG Ting;ZHENG Shuailin;LI Shenquan;ZHANG Hong(Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China;College of Environment and Resource Sciences, Shanxi University, Taiyuan 030006, China;College of Environmental Science, University of Minnesota Duluth, America)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2018年第7期188-195,共8页
Journal of Arid Land Resources and Environment
基金
山西省科技重大专项(20121101011)
国家自然科学基金项目(41301609)资助
