[1]陈晨晨,武 谦,张占友,等.澜沧江中下游流域土壤侵蚀时空演变特征[J].水土保持研究,2022,29(02):11-17+30.
　CHEN Chenchen,WU Qian,ZHANG Zhanyou,et al.Spatiotemporal Change of Soil Erosion in the Middle and Lower Reaches of Lancangjiang River[J].Research of Soil and Water Conservation,2022,29(02):11-17+30.
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澜沧江中下游流域土壤侵蚀时空演变特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 29 期数: 2022年02期 页码: 11-17+30 栏目: 出版日期: 2022-03-20
Title:
Spatiotemporal Change of Soil Erosion in the Middle and Lower Reaches of Lancangjiang River
文章编号:
1005-3409(2022)02-0011-07
作者:
陈晨晨1,2, 武 谦3, 张占友3, 董 卫2, 程 瑶1,2, 王 金4
(1.河北工程大学 河北省智慧水利重点实验室, 河北 邯郸 056038; 2.河北工程大学 水利水电学院, 河北 邯郸 056038; 3.邯郸市漳滏河灌溉供水管理处, 河北 邯郸 056001; 4.北京湜沅科技有限公司, 北京 100070)
Author(s):
CHEN Chenchen1,2, WU Qian3, ZHANG Zhanyou3, DONG Wei2, CHENG Yao1,2, WANG Jin4
(1.Hebei Key Laboratory of Intelligent Water Conservancy, Hebei University of Engineering, Handan, Hebei 056038, China; 2.School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan, Hebei 056038, China; 3.Handan Zhangfu River Irrigation and Water Supply Management Office, Handan, Hebei 056001, China; 4.Beijing Aqua Intelligent Technology Co., Ltd., Beijing 100070, China)
关键词:
澜沧江;  中下游流域;  RUSLE模型;  土壤侵蚀;  随机森林算法;  影响因子
Keywords:
Lancangjiang River;  middle and lower reaches;  RUSLE;  soil erosion;  random forest;  influence factor
分类号:
S157.1
文献标志码:
A
摘要:
为了探究土壤侵蚀演变机制,以澜沧江中下游流域为研究区域,利用改进的土壤流失方程(RUSLE)模型,开展流域内土壤侵蚀时空演变特征研究,引入随机森林算法探讨了流域内土壤侵蚀因子的相对重要程度。结果表明:澜沧江中下游流域2005—2015年土壤侵蚀量为0～1.89万t/(km2·a),平均土壤侵蚀模数为0.252万t/(km2·a),中下游子流域平均土壤侵蚀模数处于较低风险以上和中风险侵蚀以下级别。自2005年以后,澜沧江中下游流域土壤侵蚀空间分布特征呈现中度侵蚀风险区域扩张,高度和低度侵蚀风险收缩的趋势。随机森林算法结果发现植被覆盖管理因子和地形因子是影响澜沧江中下游流域土壤侵蚀的主要因素,土壤可蚀性因子、降雨侵蚀因子和水土保持措施因子的相对重要程度偏低,均未超过20%。可见,土壤侵蚀的时空异质性主要是由于植被覆盖和地形影响改变了局部气候而导致的。
Abstract:
In order to explore the evolution mechanism of soil erosion, the middle and lower reaches of Lancangjiang River was taken as the study area, the temporal and spatial evolution characteristics of soil erosion were studied by the improved RUSLE model, the relative importance of soil erosion factors was discussed by random forest(RF)algorithms. The results show that the soil erosion in the middle and lower reaches of Lancangjiang River from 2005 to 2015 ranged from 0 to 1.89×104 t/(km2·a), the average soil erosion modulus was 2.52×103 t/(km2·a); the average soil erosion moduli in the middle and lower reaches sub-basins were between the low risk and medium risk. Since 2005, the spatial distribution characteristics of soil erosion in the middle and lower reaches of Lancangjiang River showed an expanding trend in moderate erosion risk area, and shrinking trend in high and low erosion risk areas. The results of random forest algorithms indicated that cropping management factor and topography factor were the main factors affecting soil and water losses in the middle and lower reaches of Lancangjiang River, while the relative importance of soil erodibility factor, rainfall erosivity factor and support practice factor were low, all of which were less than 20%. The spatiotemporal heterogeneity of soil erosion is mainly due to the local climate changes caused by vegetation cover and topography.

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　WEI Guo-liang,LI Wei,WANG Ping,et al.Effects of Hydropower Development on Distribution of Soil Nutrients in Riparian along Lancang River[J].Research of Soil and Water Conservation,2014,21(02):47.

备注/Memo

收稿日期:2021-03-22 修回日期:2021-04-06
资助项目:国家自然科学基金(U1802241); 河北省创新研究群体项目(E2020402074); 河北省高等学校科学技术研究项目(ZD2019005); 河北省研究生创新基金(CXZZSS2021090,CXZZBS2020152)
第一作者:陈晨晨(1996—),男,山东济宁人,硕士研究生,研究方向为水利工程环境。E-mail:ccc2019szy@163.com
通信作者:程瑶(1982—),男,河北邯郸人,博士,副教授,主要从事水利工程环境影响研究。E-mail:chengyao1108@163.com

更新日期/Last Update: 2022-04-20