摘要
土壤侵蚀主要发生在我国黄土高原地区,大规模植被恢复措施的开展进一步影响了黄土高原的土壤侵蚀情况,剖析植被变化对土壤侵蚀的影响可为黄土高原生态环境治理提供理论指导。研究基于中国土壤流失方程(CSLE)以及多元数据资料,对黄土高原2000—2018年植被覆盖度、土壤侵蚀及其相互作用进行多方面分析。结果表明:(1)黄土高原自东南向西北植被覆盖度逐渐递减,19年间植被覆盖度呈稳定上升趋势;(2)2000—2018年黄土高原平均土壤侵蚀模数为2526.27 t·(km^(2)·a)^(-1),与降雨量呈正相关,丘陵、台地及起伏山地侵蚀程度较强;(3)黄土高原植被覆盖度为45%~75%的区域侵蚀程度较强,当植被覆盖度增加40%以上时,会直接引起侵蚀的加剧,而当植被覆盖度减少或增加不超过30%时,降雨量的变化是侵蚀加剧或减弱的主导因素。研究结论可为黄土高原土壤侵蚀综合防治和生态环境质量改善提供参考。
Soil erosion mainly occurs in the Loess Plateau region of China,and the implementation of large-scale vegetation restoration measures further affects the soil erosion situation on the Loess Plateau.Analyzing the impact of vegetation changes on soil erosion can provide theoretical guidance for the ecological environment management of the Loess Plateau watershed.Based on the Chinese soil loss equation(CSLE)and multivariate data,this study conducts a comprehensive analysis of vegetation coverage,soil erosion,and their interactions on the Loess Plateau from 2000 to 2018.The results show that:(1)The vegetation coverage of the Loess Plateau gradually decreases from southeast to northwest,and the vegetation coverage shows a stable upward trend over 19 years,with significant improvement in large-scale vegetation;(2)The average soil erosion modulus on the Loess Plateau from 2000 to 2018 was 2526.27 t·(km^(2)·a)^(-1),which was positively correlated with rainfall.The degree of erosion was strong in hills,plateaus,and undulating mountains;(3)The area with vegetation coverage ranging from 45%to 75%in the Loess Plateau has a strong degree of erosion.When the vegetation coverage increases by more than 40%,it directly causes the intensification of erosion.However,when the vegetation coverage decreases or increases by no more than 30%,the change in rainfall is the dominant factor for the intensification or weakening of erosion.This study can provide reference for the comprehensive prevention and control of soil erosion and the improvement of ecological environment quality in the Loess Plateau watershed.
作者
刘宇
宋进喜
邢璐通
黄钰琳
高隽清
李晓鑫
曹成珺
史阿莹
LIU Yu;SONG Jinxi;XING Lutong;HUANG Yulin;GAO Junqing;LI Xiaoxin;CAO Chengjun;SHI Aying(College of Urban and Environmental Sciences,Northwest University,Xi'an 710127,China;Yellow River Institute of Shaanxi Province,Xi'an 710127,China)
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第3期398-412,共15页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金专项项目(42041004)。
作者简介
第一作者:刘宇,男,从事水土过程耦合研究,liuyu021@stumail.nwo.edu.cn;通信作者:宋进喜,男,教授,博士生导师,从事水文学、水资源及水环境研究,jinxisong@nwo.edu.cn。
