摘要
江西省赣南稀土尾矿极易造成严重的水土流失.无人机低空航测技术作为一种低空遥测技术为土壤侵蚀强度估算提供了新的监测思路.本研究借助无人机和全站仪,在获取稀土尾矿径流小区影像及控制点坐标的基础上,利用近景摄影测量软件PhotoScan以及ArcGIS软件,得到了径流小区不同时段的侵蚀体积变化,并对稀土尾矿径流小区的土壤侵蚀量进行了估算.结果表明:无人机低空遥测生成的DEM精度可达1.24cm;小区内侵蚀沟数目有5条,小区建成以来的土壤侵蚀体积为4.63m^(3),土壤侵蚀量可达6.34t,属剧烈侵蚀等级;侵蚀沟沟型由U向V型发展;无人机低空航测技术可较好的用于稀土尾矿的水土流失动态监测和土壤侵蚀模数估算.
The tailing of South Jiangxi rare earth mine will cause serious soil erosion.This paper explores the method of rapid estimation of soil erosion by UAV low altitude aerial survey,and provides a new idea for estimating soil erosion intensity of regional rare earth tailings.The runoff plot image and control point coordinates were obtained by UAV and total station respectively,and the high-precision DEM was produced by software Photoscan,and the erosion volume change in different periods of time and the amount of soil erosion in the study area was quickly estimated was obtained by ArcGIS.The results show that the accuracy of DEM generated by UAV low altitude telemetry is 1.24cm;there are 5 erosion gullies in the runoff plot,and the total soil erosion volume is 4.63m^(3) and the soil erosion amount is 6.34t,which belongs to severe erosion;after 2016,the erosion gully tends to be stable and the annual erosion is small.UAV telemetry can be used for dynamic monitoring of soil and water loss of rare earth tailings and estimation of soil erosion model.
作者
李晓放
廖凯涛
宋月君
左继超
罗谦智
徐雯
LI Xiaofang;LIAO Kaitao;SONG Yuejun;ZUO Jichao;LUO Qianzhi;XU Wen(Jiangxi Institute of Soil and Water Conservation,Nanchang 330029,China;School of Geographic and Environment,Jiangxi Normal University,Nanchang,330022,China;Yuanzhou District Water Resources Bureau of Yichun City of Jiangxi Province,Yichun 336000,China;Nanchang Rail Transit Group Co.,Ltd,Nanchang 330038,China)
出处
《江西水利科技》
2021年第1期44-49,共6页
Jiangxi Hydraulic Science & Technology
基金
国家自然科学基金项目(41967011)
江西省自然科学基金项目(20181BAB203024)
江西省水利厅科技项目(202022YBKT20).
