干旱区生态环境知识资源中心(Arid): 渭河流域径流对土地利用变化的时空响应

Arid

	渭河流域径流对土地利用变化的时空响应
其他题名	Spatiotemporal responses of runoff to land use change in Wei River Basin
	黎云云 1; 畅建霞 1; 王义民 1; 金文婷 1; 白夏 2
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2016
卷号	32 期号:15 页码:232-238
中文摘要	为定量分析渭河流域土地利用变化对径流的时空影响,该文基于渭河流域1985年,1995年和2005年3期土地利用数据,分析了流域近20 a的土地利用变化特征,结合SWAT(soil and water assessment tool)水文模型,设置5种土地利用变化情景,研究了流域土地利用变化与年、季径流的响应关系。结果表明,SWAT模型在渭河流域有较好的适用性;耕地、林地和草地为流域主要土地利用类型,面积变化小于10%,但它们在空间上的位置发生了较大转移;流域近20 a土地利用变化对径流影响小于15%;极端土地利用情景下,产流量总体趋势为耕地>草地>林地。退耕还林对年、季径流的影响程度均为干流大于支流,退耕还草对年径流(干流中游、下游、泾河)和季径流(冬季)的影响程度较大。该研究成果对于流域土地利用格局的合理规划及极端水文事件的控制具有重要意义。
英文摘要	Change in land use impacts the runoff availability to a large extent, which in turn, influences the surface and groundwater characteristics in a drainage area, and hence easily leads to the occurrence of droughts or floods in the basin. Therefore, it is essential to study the runoff response to land use change of a drainage basin on sub-basin level in particular, which has significant importance for planning land use patterns rationally and controlling watershed extreme hydrological events effectively. The Wei River basin(WRB), a typical arid and semi-arid region in northwest China, was selected as the study area and divided into 5 sub-basins. The main goal of current study was to investigate the spatiotemporal runoff responses to land use change in the WRB at sub-basin level. The change characteristics of land use in 1985, 1995 and 2005 in WRB were firstly analyzed with the transformation matrix. The Soil and Water Assessment Tool(SWAT) was calibrated for a baseline period of 1978-1986. Based on the results of land use change, 5 land use change scenarios were set in this paper. Then the calibrated SWAT model was run under these land use change scenarios by holding other data(e.g., meteorological and soil data) constant. The spatial runoff responses to land use change at both yearly and seasonal scales were analyzed based on the SWAT outputs. The results showed that: 1) The SWAT model had suitable application in the WRB with R~2 of higher than 0.6, Nash-Suttcliffe(Ens) of higher than 0.5 and relative error(Re) of lower than 20%, which indicated that the SWAT model could be used to study the impact of land use change on runoff variation in the WRB; 2) The main land use types of WRB were farmland, woodland and grassland which accounted for 98% of the whole basin area with high transfer frequency in space, while their area change percentages were all less than 10%; the total area of other land use types was small, but their change rates were all approximate to 40% and they were mainly transformed into cultivated land; 3) The contribution of land use change to runoff variation on decade scale in 5 subzones was less than 15%; the magnitudes of yearly discharge in 3 extreme land use scenarios in Beiluo basin were woodland > farmland > grassland, and farmland > grassland > woodland in other 4 basins; 4) For the conversion of farmland to woodland scenario, the yearly runoff in Beiluo basin increased while that in other 4 sub-basins decreased, and the conversion’s impacts on the yearly runoff in the mainstream were greater than that in the tributary; for the conversion of farmland to grassland scenario, the yearly runoff in 5 sub-basins was all decreased, and the yearly runoff in the middle and lower reaches of the mainstream as well as the Jing River basin among the tributaries was decreased more significantly than other sub-basins; 5) Generally, the response degrees of seasonal runoff in the conversion of farmland to woodland scenario were higher than that in the conversion of farmland to grassland scenario; compared to other 3 kinds of seasonal runoff(i.e. spring, summer and autumn runoff), the winter runoff showed the most sensitive variation in both scenarios; the winter runoff decreased in the Jing River basin but increased in other basins in the scenario of returning farmland to forest, while it decreased in the tributary but increased in the mainstream in the scenario of returning farmland to grassland. The research results can play extremely important roles on the improvement of the ecological environment and the control of hydrological extreme drought events, and can also help to provide valuable reference for the watershed land use pattern’s planning and integrated management in WRB.
中文关键词	土地利用 ; 径流 ; 水文 ; 模型 ; 情景分析 ; 渭河流域
英文关键词	land use runoff hydrology models scenario analysis Wei River Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ECONOMICS POLICY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5769256
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234618
作者单位	1.西安理工大学, 西北旱区生态水利工程国家重点实验室培训基地, 西安, 陕西 710048, 中国; 2.蚌埠学院机械与车辆工程系, 蚌埠, 安徽 233030, 中国
推荐引用方式 GB/T 7714	黎云云,畅建霞,王义民,等. 渭河流域径流对土地利用变化的时空响应[J],2016,32(15):232-238.
APA	黎云云,畅建霞,王义民,金文婷,&白夏.(2016).渭河流域径流对土地利用变化的时空响应.农业工程学报,32(15),232-238.
MLA	黎云云,et al."渭河流域径流对土地利用变化的时空响应".农业工程学报 32.15(2016):232-238.