摘要
以晋江西溪流域为研究区,基于HEC-HMS水文模型,建立研究区暴雨洪水模型;通过对流域内的森林覆被变化的情景假定,并选取典型的多峰洪水过程,探讨森林覆被增加对不同频率多峰暴雨洪水过程的影响。结果表明:对于多峰暴雨洪水过程,森林覆被的增加会造成流域出口处的洪峰流量及洪量减小,且随着暴雨强度的增强,变化幅度呈现减小的趋势;同时,对多峰暴雨产生的不同洪峰的影响存在一定差异,随着降雨过程的持续增强,对洪峰的影响程度逐渐减弱。
A spatially distributed hydrologic model（HEC-HMS）,was examined for its applicability in the Xixi watershed,a 1259km2 drainage basin in southeast China.The simulations were performed under designing flood events associated with different frequency to study the influence of forest cover changes on multiple-peaked storm flood process.The analysis shows that,along with the increase of forest coverage,the scenarios result in obvious decrease in peak discharge and volumes,and the sensitivity of hydrologic response to land use change tends to decrease as the frequency of the flood events increase.Furthermore,the influence of forest cover change on storm flood presented weakened with the rainfall intensity enhanced.
出处
《中国水土保持科学》
CSCD
2010年第5期19-23,共5页
Science of Soil and Water Conservation
基金
福建省科技计划重点项目"晋江流域洪水分布式模拟的时空尺度影响研究"(2009R10039 2)
福建师范大学地理科学学院研究生创新基金资助项目"基于HEC-HMS模型的晋江流域土地利用/覆被变化的洪水响应研究"(2009)
关键词
森林覆被
多峰洪水
洪水响应
西溪流域
forest cover
multiple-peaked storm flood
flood response
Xixi watershed
