水利学报2017，Vol.48Issue(6)：678-688,11.DOI:10.13243/j.cnki.slxb.20160900
黄土高塬沟壑区绿水对土地利用和气候变化的响应研究——以南小河沟流域为例
Impacts of land use change and climate variation on green water in the Loess Plateau Gully Region——A case study of Nanxiaohegou basin
摘要
Abstract
The ecological environment of Loess Plateau gully area is fragile,and the water resources are very scarce.In this study,the typical small watershed gully area of the Loess Plateau——Nanxiaohegou basin was selected as the study area.The variation of green water in Nanxiaohegou was revealed based on land use and meteorological data,furthermore,response of green water to climate and land use change was analyzed.Besides,this paper made some researches quantifying the respective contribution of land use and climate changes to green water from 1954 to 2012.The results show that:(1) The mean annual green water of Nanxiaohegou basin is 443.2mm.According to the K-M statistical test,green water of Nanxiaohegou basin shows a decreasing trend,but the trend is not obvious.At the same time,according to the UF and UB curves of the position of the intersection,annual green water mutated around 1978.(2) Interannual variation of green water in different land use types is uneven,among which the green water in forest is the largest,grassland comes second and construction land is the least;the precipitation is a major limiting factor affecting green water in climate variation.(3) According to the results of scenario analysis,the contribution rate of climate and land use change to the annual green water reduction are 123.6％ and-23.6％,while the results calculated by the separation of evaluation method are 137.7％ and-37.7％.It indicates that the contribution of climate factors for green water change is more than that of the land use factors,while the increase of forest area is the reason for green water increase because of the land use change.The research provides a reasonable and effective theoretical basis for the restoration of regional ecological environment,regional water resources planning and management of the Loess Plateau.关键词
绿水/土地利用/气候变化/定量评价/南小河沟流域Key words
green water/land use/climate change/quantitative evaluation/Nanxiaohegou basin分类
建筑与水利引用本文复制引用
夏露,宋孝玉,符娜,李怀有,李垚林..黄土高塬沟壑区绿水对土地利用和气候变化的响应研究——以南小河沟流域为例[J].水利学报,2017,48(6):678-688,11.基金项目
国家自然科学基金项目(41171034) （41171034）
陕西省水利科技计划项目(2016slkj-11) （2016slkj-11）
陕西省教育厅重点实验室科研计划项目(14JS059) （14JS059）
陕西省教育厅服务地方专项计划项目(2013JC18) （2013JC18）
