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[1]WEI Wenjie,YUAN Li,LI Wenlong,et al.Study on the Grid Calculation Results of Wind Erosion at County Scale[J].Research of Soil and Water Conservation,2023,30(04):42-46,52.[doi:10.13869/j.cnki.rswc.2023.04.031.]

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Study on the Grid Calculation Results of Wind Erosion at County Scale

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 04 Page number: 42-46,52 Column: Public date: 2023-06-10

Title:: Study on the Grid Calculation Results of Wind Erosion at County Scale

Author(s):: WEI Wenjie¹, YUAN Li², LI Wenlong¹, LIU Zhuohao¹, GAO Ruiyu¹, ZHANG Ronghua¹, MAO Yulei³; (1.Shandong Taishan Forest Ecosystem National Positioning Research Station/College of Forestry, Shandong Agricultural University, Tai'an, Shandong 271018, China; 2.Huaihe River Basin Soil and Water Conservation Monitoring Center of Huaihe River Water Conservancy Commission, Bengbu, Anhui 233001, China; 3.Shandong Hydrology and Water Environment Technology Co., Ltd., Jinan 250014, China)

Keywords:: Yellow River alluvial area; wind erosion model of cultivated land; grid; plot

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2023.04.031.

Abstract:: [Objective] This paper discusses the situation of determining wind eroded land plot based on grid erosion data, providing reference for county scale erosion calculation and soil erosion grid calculation results landing. [Methods] Lankao County, Henan Province, in the Yellow River alluvial area was taken as an example. Based on the wind erosion model of cultivated land, grid calculation and software judgment method combined with field verification were used to explore the implementation of grid calculation results of wind erosion at county scale to plots. [Results](1)The wind erosion area of cultivated land in Lankao County was 125.91 km², involving 1 259 128 grids, and the erosion modulus concentrated in the range of 200 t/(km²·a)and 400 t/(km²·a).(2)The wind erosion area of cultivated land calculated by software judgment method was 125.08 km², involving 2 284 plots, and the erosion modulus concentrated between 200 t/(km²·a)and 400 t/(km²·a). The plots with more than 50% in loss proportion accounted for 96% of the total plots eroded by wind, and the plots with 100% in loss proportion ranged from 0.000 04 km² to 0.6 km².(3)In terms of area relative error, the relative error of software judgment method and grid calculation method was 0.66%, the relative error for Chengguan Town was the largest(136.50%), and the relative error for Zhangjunmu Town was the smallest(0.56%). In the spatial distribution, the software judgment method had higher aggregation index and lower dispersion degree than the grid calculation method, and the spatial distribution was concentrated and continuous.(4)In the field validation, the intensity of 34 wind-erosion plots was consistent with the software judgment method, with an agreement rate of 68%. [Conclusion] Under the premise of controlling the land area of cultivated land, the software judgment method was feasible and reasonable to implement the results of wind erosion calculated by grid into the land area.

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Last Update: 2023-06-10