摘要
【目的】研究定西市安定区土壤侵蚀时空变化,为实现该地区黄河流域生态保护和高质量发展这一战略以及合理开展水土保持工作提供参考。【方法】基于修正的通用土壤流失方程(RUSLE)模型和地理信息系统(GIS)、遥感技术(RS)等手段,分析安定区1980~2019年间土壤侵蚀状况的时空变化趋势。【结果】安定区土壤侵蚀分布与植被覆盖度因子及水土保持措施因子密切相关;土壤侵蚀空间差异显著,流失区主要集中于研究区北部、中部山区以及西南部部分地区,土壤侵蚀分散且多呈块状和点状分布;安定区1980、2000、2019年年均土壤侵蚀模数分别为5074.90、3108.58、604.22 t/(km^(2)·a),总体呈现减少趋势。【结论】RUSLE模型计算出的土壤侵蚀模数总体精度较好,后期可以通过深入研究,进一步提高模型计算的精确性。
【Objective】To study on the temporal and spatial changes of soil erosion in Anding District of Dingxi City,and to provide reference for realizing the strategy of ecological protection and high-quality development of the Yellow River Basin and rationally carrying out soil and water conservation work.【Method】Based on the revised universal soil loss equation(RUSLE)model,geographic information system(GIS),remote sensing technology(RS)and other methods,this study analyzed the temporal and spatial trends of soil erosion in Anding District from 1980 to 2019.【Result】The distribution of soil erosion in Anding District is closely related to vegetation coverage factors and soil and water conservation measures;2)The spatial difference of soil erosion in the study area is obvious.The loss area is mainly concentrated in the northern part of the study area,the central mountainous area and parts of the southwest.The soil erosion is scattered,and most of them are massive and dotted;The average annual soil erosion modulus in Anding District in 1980,2000 and 2019 were 5074.90 t/(km^(2)·a),3108.58 t/(km^(2)·a)and 604.22 t/(km^(2)·a),respectively.Overall showing a decreasing trend.【Conclusion】The overall accuracy of the soil erosion modulus calculated by the RUSLE model is relatively good.In-depth research can be used in the later stage to further improve the accuracy of the model calculation.
作者
高凡洁
张富
胡彦婷
柴亚昕
包炳琛
蒋承洋
GAO Fanjie;ZHANG Fu;HU Yanting;CHAI Yaxin;BAO Bingchen;JIANG Chengyang(College of Forestry,Gansu Agricultural University,Lanzhou 730070,China)
出处
《甘肃农业大学学报》
CAS
CSCD
2022年第1期161-168,共8页
Journal of Gansu Agricultural University
基金
不同措施下黄土丘陵沟壑区生态系统水土保持功能分析(GSAU-XKJS-2018-105)
祖厉河流域水质变化趋势研究(2020B-323)。
关键词
土壤侵蚀
RUSLE模型
时空特征
安定区
soil erosion
RUSLE model
temporal and spatial characteristics
Anding District
