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2018-2019年河南省兰考县土地利用变化对耕地风蚀的影响
高睿瑜1, 张芷温1, 李文龙1, 李明宇1, 牛勇1, 张荣华1, 张光灿1, 袁利2, 张春强2
1.山东泰山森林生态系统国家定位研究站, 山东农业大学 林学院, 山东 泰安 271018;2.淮河水利委员会 淮河流域水土保持监测中心站 安徽 蚌埠 233001
摘要:
[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浇地为主,出现土地利用变化的区域面积为21.40 km2,水浇地动态度为-1.54%,主要变化类型为水浇地转为其他林地,面积7.19 km2。②兰考县耕地风蚀主要为微度,其次为轻度。2018-2019年,轻度侵蚀面积减少17.04 km2,动态度为-12.13%。③ 2018-2019年,兰考县耕地风蚀变化的主要原因是水浇地面积、空间位置的变化,因水浇地转出导致侵蚀减少的面积为3.36 km2,主要位于仪封乡、城关镇等区域;因水浇地转入造成侵蚀增加的面积为0.98 km2,主要位于仪封乡、葡萄架乡等区域。[结论] 淮河流域黄泛平原风沙预防区土地利用结构、耕地风蚀特点鲜明,水浇地变化直接影响耕地风蚀。因此,区域应多关注耕地风蚀治理及耕地合理利用。
关键词:  风蚀动态变化  耕地风蚀模型  土地利用变化  淮河流域黄泛平原  风沙预防区
DOI:10.13961/j.cnki.stbctb.2021.01.016
分类号:S157.1
基金项目:淮河水利委员会项目“基于遥感和土壤侵蚀模型的淮河流域重点预防区水土流失监测评价与消长分析”(SBJ-2019-010)
Effects of Cultivated Land on Wind Erosion of Annual Land Use Change at Lankao County, He'nan Province During 2018-2019
Gao Ruiyu1, Zhang Zhiwen1, Li Wenlong1, Li Mingyu1, Niu Yong1, Zhang Ronghua1, Zhang Guangcan1, Yuan Li2, Zhang Chunqiang2
1.Mountain Tai Forest Ecosystem Research Station of State Forestry/College of Forestry, Shandong Agricultural University, Tai'an, Shandong 271018, China;2.Monitoring Center Station of Soil and Water Conservation, Huaihe River Commission, Ministry of Water Resources, Bengbu, Anhui 233001, China
Abstract:
[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] ① In 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). ② The 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%. ③ During 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 km2 due 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.
Key words:  dynamic change of wind erosion  model of wind erosion of cultivated land  land use change  Huaihe River basin  Yellow River alluvial area