Sensitivities of Flood Events to Climate and Land Surface Change in the Qingjianhe Catchment
Climate and land surface change of a catchment could lead to changes in the hydrological processe consequently,especially the changes of extreme hydrologic events like flood.The Qingjianhe Catchment (QJH) is one of the most important tributaries of the Yellow River.Since 1950s,large scale water and soil conservation countermeasures have greatly changed the land surface property of the region.More recently,mining industries have further intensified the process on land use change.In this paper,on the basis of a well calibrated hydrological model GR4J,the sensitivity of flood events to precipitation and land surface changes have been investigated.The results show that the peak flow of flood event is positively related to precipitation intensity with elasticity coefficient varying at 1.67 ~4.52.The coefficient decreases with the increase of recurrence period of the flood events.Peak flow tends to be negative with parameters representing production store and routing time,but be positive with the routing store.Moreover,the sensitivity of the flood event to climate and land surface change varies with the recurrence period of the flood.The longer the recurrence period of the flood event,the lower sensitivity the poak flow to precipitation and producfion store is.
flood events hydrological model climate change land use change Qingjianhe Catchment
Zhu Ruirui Zheng Hongxing Liu Changming Huo Shiqing Xu Keyan
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijin Hydrological Bureau, Yellow River Conservancy Commission of the Ministry of Water Resources, Zhengzh
国际会议
The 5th International Yellow River Forum (第五届黄河国际论坛)
郑州
英文
182-189
2012-09-24（万方平台首次上网日期，不代表论文的发表时间）