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引用本文:李致家,周赛,姚玉梅,戴健男,张建中,胡春岐,姚成.经验方法研究下垫面变化对洪水的影响.湖泊科学,2012,24(4):637-642. DOI:10.18307/2012.0419
LI Zhijia,ZHOU Sai,YAO Yumei,DAI Jiannan,ZHANG Jianzhong,HU Chunqi,YAO Cheng.Impacts of altered basin landscape on floods using an empirical method. J. Lake Sci.2012,24(4):637-642. DOI:10.18307/2012.0419
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经验方法研究下垫面变化对洪水的影响
李致家1, 周赛1, 姚玉梅1, 戴健男1, 张建中2, 胡春岐3, 姚成1
1.河海大学水文水资源学院, 南京 210098;2.海委科技咨询中心, 天津 300170;3.河北省水文水资源勘测局, 石家庄 050031
摘要:
1980s以来,人类活动对下垫面的影响加剧,研究下垫面变化对流域产汇流规律的影响具有重要意义.通过对海河流域中紫荆关、阜平两个流域分别用经验方法进行洪水模拟演算,并把洪水资料按照年代不同分时段,建立P+Pa~Rs相关关系图,分析流域下垫面变化对降雨径流相关关系的影响.建立产流量R与洪峰Qm之间的相关关系,通过统计比较不同年代的趋势线发现,在产流量相同情况下,1980s后的洪峰流量较1980s前有所减少,说明海河流域的调蓄作用有增强的趋势.同时建立流域下垫面条件改变后产流量与洪峰变化幅度的相关关系,发现流域产流量变化与洪峰变化呈正相关关系.
关键词:  下垫面变化  经验方法  单位线  P+Pa~Rs曲线  海河流域
DOI:10.18307/2012.0419
分类号:
基金项目:国家博士点基金项目(20090094110005);半湿润半干旱流域用于水文预报的新一代降雨径流水文模型研究项目(41130639);洪水预报降雨径流分布式水文模型中新一代流域汇流模型及尺度规律研究项目(51179045)联合资助
Impacts of altered basin landscape on floods using an empirical method
LI Zhijia1, ZHOU Sai1, YAO Yumei1, DAI Jiannan1, ZHANG Jianzhong2, HU Chunqi3, YAO Cheng1
1.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P. R. China;2.Science and Technology Information Center HWCC, Tianjin 300170, P. R. China;3.Hebei Hydrology and Water Resources Survey Bureau, Shijiazhuang 050031, P. R. China
Abstract:
Since 1980s, with the increasing impacts of human activities on the river basin landscape, it is significant to investigate the impact of landscape changes on the rainfall-runoff regime. This paper simulated the floods occurred in the Zijingguan and Fuping catchments of the Haihe Basin using an empirical method. The flood data were segmented by time for creating the P+Pa~Rs curve to analyse the influence of the altered catchment landscapes on surface flow regime. Based on the unit hydrograph method, the relationship between the runoff R and peak discharge Qm was established. The results show that by comparison of the trendlines in different time periods, with the same runoff volume, the peak discharge after 1980s is less than that before 1980s. It indicates that the water regulation function of Haihe Basin was enhanced. Based on the relationship between the changes of runoff and peak discharge induced by the altered basin landscapes, it is found that there is a positive correlation between them.
Key words:  Altered basin landscapes  empirical method  unit hydrograph  P+Pa~Rs curve  Haihe Basin
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