西北师范大学学报（自然科学版）2018，Vol.54Issue(1)：92-99,8.DOI:10.16783/j.cnki.nwnuz.2018.01.015
1956—2015年洮河径流演变特征研究
Changeable characteristics of channel discharge in the Taohe River Basin from 1956 to 2015
摘要
Abstract
In this study , we collected hydrological data series from four basic observational stations over mainstream of the Taohe River Basin . Then we adopted statistic methods including unevenness coefficient ,concentration index ,Gini coefficient ,Mann-Kendal test ,Sen's slope and U curve ,and so on , to make comprehensive study on changeable characteristics like variation trend , variable amplitude and normal/wet/dry time periods of the channel discharges . Results show that it was uneven for inner-annual distribution of the discharge . River flow amount in flood season occupied fraction ranged from 54％～56％ to the annual total . Variation trend were closed to each other between the four stations' time series . There experienced an increase of channel discharge before 1990 , then a downturn occurred . The decrease of discharge was mainly caused by deduction of that during flood season . U curves could determine normal/wet/dry period based on analysis of discharge amount with more intuition . Persistence time and occurring frequency were both less for wet period , when compared to those of the dry period , during the time period from 1956 to 2015 . The study could set an example for statistical analysis on changeable river discharges and provide data support on regional water resources development and allocation .关键词
河川径流/演变特征/统计/洮河流域Key words
channel discharge/changeable characteristics/statistic/Taohe River Basin分类
天文与地球科学引用本文复制引用
王万瑞,王刘明,张雪蕾,李常斌..1956—2015年洮河径流演变特征研究[J].西北师范大学学报（自然科学版）,2018,54(1):92-99,8.基金项目
国家自然科学基金资助项目(41671017 ,41401472 ) （41671017 ,41401472 ）
