云南元江流域水库汛期来水对降水旱涝急转的响应关系研究  

Study on Response of Wetness-dryness Inflow Alternation of Reservoirs in Flood Season in the Yuanjiang River Basin of Yunnan to the Dry-wet Abrupt Alternation of Precipitation

作　　者：和梅辉 王龙 余航 刘有梅 高瑞 郭文雅 王葵 HE Mei-hui;WANG Long;YU Hang;LIU You-mei;GAO Rui;GUO Wen-ya;WANG Kui(College of Water Conservancy,Yunnan Agricultural University,Kunming 650201,China)

机构地区：[1]云南农业大学水利学院,云南昆明650201

出　　处：《水电能源科学》2021年第6期5-8,4,共5页Water Resources and Power

基　　金：国家自然科学基金项目(51669035);云南省教育厅基金项目(2020J0246)。

摘　　要：基于1990~2016年元江流域水库水文资料,采用标准化降水异常值和标准化来水异常值指标识别降水旱涝急转和水库来水丰枯转换现象,构建了旱涝急转与来水丰枯转换事件强度指标DWAI与WDIAI,建立了DWAI与WDIAI之间的响应关系,并分析了相关参数与水库集水面积之间的关系。结果表明,元江流域水库降水与来水年内分配极不均匀,降水主要集中在5~11月、来水集中在6~11月,分别占年降水量80%以上和年来水量的70%以上;流域内9个站点1990~2016年期间,汛期发生旱涝急转事件87站次,来水丰枯转换事件77站次。旱涝急转事件与来水丰枯转换事件并不完全对应,共有41站次降水旱涝急转与来水丰枯转换一致。建立了降水旱涝急转强度和来水丰枯转换强度之间的线性回归模型(R^(2)=0.8073),但不同站点回归方程的斜率存在差异,进一步探讨表明斜率与集水面积存在非线性幂函数关系(R^(2)=0.7309)。Based on the reservoir hydrological data of Yuanjiang River Basin during 1990~2016,this paper used standardized precipitation anomalies value index and standardized inflow anomalies value index to identify the rapid change of precipitation from dry-wet and the phenomenon of wetness-dryness inflow alternation from reservoir,constructed the event intensity index DWAIand WDIAI,established the response relationship between DWAIand WDIAI,and analyzed the relationship between the parameters of the fitting equation and the catchment area of reservoir.The results show that the distribution of reservoir precipitation and inflow in Yuanjiang River Basin is extremely uneven,the precipitation is mainly concentrated from May to November,and the inflow is concentrated from June to November,which accounted for more than 80%of the annual precipitation and more than 70%of the annual inflow respectively.At 9 stations in the basin,during the period from 1990 to 2016,there were 87 stations in which the dry-wet abrupt alternation of precipitation during the flood season,and 77 stations in which the wetness-dryness inflow alternation of reservoirs.The sudden change of drywet of precipitation didn’t completely correspond to the event of wetness-dryness inflow alternation,there were 41stations in which the dry-wet abrupt alternation of precipitation is consistent with the wetness-dryness inflow alternation of reservoirs.A regression model(R^(2)=0.8073)between the intensity of dry-wet alternation and the intensity of wetness and dryness alternation of inflow was established,but the parameters of fitting equation for different stations were not the same.Furthermore,there was a nonlinear power function relationship between gradient and catchment area(R^(2)=0.7309).

关 键 词：旱涝急转 丰枯转换 响应关系 水库 

分 类 号：P339[天文地球—水文科学]