农业机械学报2017，Vol.48Issue(7)：257-264,8.DOI:10.6041/j.issn.1000-1298.2017.07.032
土地覆被变化对径流量影响的GSAC模型分析
Impacts of Land Cover Change on Runoff Based on Grid-based Sacramento Model
摘要
Abstract
In cold region of China,problems exist in the study of hydrological models,including lack of basic data,low spatial and temporal resolution of available data and the difficulty of quantitative calculating evapotranspiration,snow cover and snow melting.In response,grid-based Sacramento (GSAC) model was selected,different land cover change scenarios were set,effects of land cover change on runoff were analyzed quantitatively,and runoff in dry season was predicted.Results showed that in simulating the daily runoff of Baoqing River Watershed in cold region with model which had parameters calibrated,the average determination coefficient was 0.732 9 during the periods of calibration and validation,which well reproduced the daily runoff of this watershed during 1997-2001;returning farmland to grassland or forest can both increase the annual runoff,with the growth rate between 3.09％and 44.85％,and the growth rate of returning farmland to grassland had more influence on runoff;the steepness of land returned to grassland or forest had negative correlation with the runoff at the watershed export section,i.e.,the smaller the slope was,the greater the flow was;the average runoff of farmland with steepness over 15° after being returned to grassland was similar with the ecological water demand in this area.关键词
水土资源/土地覆被变化/GSAC模型/生态需水量/宝清流域Key words
soil and water resources/land cover change/grid-based Sacramento model/ecological water demand/Baoqing River Watershed分类
天文与地球科学引用本文复制引用
白雪峰,王斌,戚颖..土地覆被变化对径流量影响的GSAC模型分析[J].农业机械学报,2017,48(7):257-264,8.基金项目
国家自然科学基金青年科学基金项目(51109037),农业部农业水资源高效利用重点实验室开放课题项目(2015001,2015003)和黑龙江教育厅科学技术研究项目(12531051) （51109037）
