2018-2019年河南省兰考县土地利用变化对耕地风蚀的影响

[目的]探索淮河流域黄泛平原风沙预防区耕地风蚀现状、年度动态及其变化原因,为区域风蚀研究与治理提供科学依据.[方法]选取河南省兰考县为研究对象,通过高分辨率遥感影像解译2018,2019年土地利用信息,采用耕地风蚀模型计算风蚀模数,分析土地利用年度变化对耕地风蚀的影响.[结果]①2018-2019年,兰考县土地利用以水...

Effects of Cultivated Land on Wind Erosion of Annual Land Use Change at Lankao County, He'nan Province During 2018-2019

[Objective]The current situation and annual dynamic change of wind erosion on cultivated land in the Yellow River alluvial area of the Huaihe River basin were studied to provide a scientific basis for regional wind erosion research and control.[Methods]Lankao County,He'nan Province,was selected as the research area to interpret the land use information in 2018 and 2019 using high-resolution remote-sensing images.The wind erosion model of cultivated land was used to calculate the modulus of wind erosion,and the effects on wind erosion of cultivated land of annual land-use change were analyzed.[Results]①In 2018-2019,the major type of land use at Lankao County was irrigated land,and the area of land use change was 21.40 km².The dynamic degree of irrigated land was-1.54%.The main change in land use was from irrigated land to forest land(7.19 km²).②The main wind erosion intensity on cultivated land at Lankao City was mild erosion,followed by light erosion.The erosion area was reduced by 17.04 km²,and the dynamic degree was-12.13%.③During 2018-2019,the changes in wind erosion on cultivated land at Lankao County were closely related to the changes in the area and spatial location of the irrigated land.The area of erosion reduction caused by the rotation of irrigated land was 3.36 km²,mainly located in Yifeng Township,Chengguan Town and other areas.The area increased by 0.98 km²due to the transfer of irrigated land,which was mainly located in Yifeng township,Putaojia Town and other areas.[Conclusion]The characteristics of land use and wind erosion on cultivated land in the Yellow River alluvial area of the Huaihe River basin are distinct,and the changes in irrigated land directly affect cultivated land wind erosion.Therefore,more attention should be paid to controlling the wind erosion of cultivated land and using the cultivated land effectively.