基于CSLE的汕头市土壤侵蚀定量分析研究

Research on quantitative analysis of soil erosion in Shantou City based on CSLE

土壤侵蚀目前已成为全球范围内主要的环境和农业问题之一。为了摸清华南红壤区市级土壤侵蚀空间分布规律,选择广东省汕头市为研究区域,采用卫星遥感与地面监测相结合的研究方法,利用中国土壤流失方程(CSLE)开展了对2018年汕头全市的土壤侵蚀模数计算研究,并分析了研究区水土流失状况。研究结果表明:土壤侵蚀面积较大的是潮南区(8832 km^(2))、朝阳区(8103 km^(2))和濠江区(2691 km^(2)),以自然侵蚀为主;土壤侵蚀面积较小的是龙湖区(1259 km^(2))、澄海区(1137 km^(2))、金平区(939 km^(2))和南澳县(766 km^(2))。生产建设侵蚀面积占比9362%,主要集中在练江中下游、榕江下游和中心城区,坡地开发侵蚀面积占比491%,主要集中在潮阳区和潮南区。研究结果指出:降雨的时空分布不均为水土流失提供外营力条件;植被覆盖度降低是引发土壤侵蚀上升的重要因素;人类的生产建设开发项目活动加剧了水土流失的发生。研究成果对研究区与周边区域的水土流失综合治理的效益评估、生态文明建设、生态环境保护具有重要意义。

Soil erosion has become a worldwide one of the major environmental and agricultural problems.To take red soil region of south China city spatial distribution of soil erosion,choose Shantou City of Guangdong Province as the study area,by adopting the combination of satellite remote sensing and ground monitoring research methods,using Chinese Soil Loss Equation(CSLE)to carry out the modulus of soil erosion of shantou city in 2018 computing research,and analyzes the situation of soil and water loss in the study area.The results show that soil erosion is ChaoNa area larger area(8832 km^(2)),Chaoyang district(8103 km^(2))and Hao gong area(2691 km^(2)),is given priority to with natural erosion;soil erosion is smaller Longhu district(1259 km^(2)),the Chenghai area(1137 km^(2)),Jin area(939 km^(2))and south Australia county(766 km^(2)).Production and construction of erosion area accounted for 9362%,mainly concentrated in the middle and lower reaches of the Lian River,Rongjiang practice and city center,the development of slope erosion area accounted for 491%,mainly concentrated in the chaoyang area and Chaonan area.Research result points out:uneven rainfall distribution of space and time for soil and water loss camp outside force conditions;vegetation coverage reduce is one of the important factors caused soil erosion rise;human production and construction project activities contributed to the development of soil and water loss.Research results of the study area and the surrounding area of the comprehensive control of soil and water loss in efficiency evaluation,the construction of ecological civilization,ecological environment protection is of great significance.