基于HRU的抚河上游地表产流对土地利用变化响应特征
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江西农业大学

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P333

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Study on the response characteristics of surface runoff to land use change in the upper Fu River on HRU
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Jiangxi Agricultural University

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    摘 要:为定量分析抚河上游地表径流对土地利用变化响应特征,以抚河上游2005—2019年实测径流数据、气象数据和土地利用数据为基础构建SWAT模型,在HRU尺度分析地表径流对土地利用变化的响应规律。研究表明:(1)SWAT模型在抚河上游有较好的适用性;(2)2005—2019年抚河上游土地利用主要类型为林地和耕地,而建设用地扩张速度最快;(3)抚河上游土地日益细碎化,主要是林地和建设用地的面状扩张造成耕地破碎导致HRU数量增加;(4)抚河上游流域月地表径流系数与降雨量呈正相关,全年呈现先增加后下降趋势,由于耕地面积的减少和建设用地的扩张,抚河上游地表径流呈增加趋势;(5)2005—2019年4期土地利用现状下,不同土地利用类型的地表径流大小次序为建设用地>耕地>林地。

    Abstract:

    Abstract: In order to quantitatively analyze the response characteristics of surface runoff to land use change. Based on the measured runoff data, weather data and land use data of the upper Fu River from 2005 to 2019, constructed SWAT model based on ArcGIS10.2, analysing the response pattern of surface runoff to land use change at the HRU scale, exploring surface runoff effects of different land use types. The results were summarized as follows. (1)The SWAT model had good applicability in the Fu River. (2)The main types of land use in the upper Fu River from 2005 to 2019 were forest land and cultivated land, while construction land expanded at the fastest rate. (3)Increased fragmentation of land in the upper Fu River is primarily attributed to the fragmentation of cultivated land caused by the expansion of forest land and construction land, resulting in a rise in the number of hydrological response units. (4)Monthly surface runoff coefficients in the upper Fu River are positively correlated with precipitation, showing an increasing and then decreasing trend throughout the year. As a result of the reduction in cultivated land and the increase in construction land, the surface runoff in the upper Fu River shows an increasing trend. (5)The order of surface runoff of land use status from 2005 to 2019 different land use types is construction land>cultivated land>forest land.

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  • 收稿日期:2023-10-19
  • 最后修改日期:2024-06-12
  • 录用日期:2024-06-17
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