贵州省枯季径流特性初步分析

在无资料地区以降水径流法推求径流资料系列时,除了要有年径流统计参数外,还应有其枯季径流和最枯月径流的有关指标,而由于受气候、下垫面条件(地形、植被、岩溶等)差异的影响,各地枯季径流特性各异。本文通过贵州省86个县、市、区气象站及45个水文站(控制集水面积由几十~上万km2)建站至今的实测资料分析,得出了贵州省各个地区枯季的时段、各站枯季径流统计参数、最小月径流模数和多年平均最小日均流量模数的关系,对了解贵州省的枯季径流特性和在无资料地区径流设计中都具有参考价值。

Preliminary Analysis On Runoff Features of Dry Season In Cuizhou Province

When runoff datum series is deduced by precipitation-runoff method without data,there must be related runoff data of dry season as well as the driest month besides the statistics data about annual runoff.The runoff features in dry season of various regions are different because their topography,geology,vegetation and etc.are different.The paper has analyzed all data collected by 86 weather stations and 45 hydrology stations distributed Guizhou Province from beginning to now,deduced statistics data about runoff parameters of every region in different periods of dry season,the relationship between the two module of minimum month runoff and average long-time minimum flow in a day.The data have some reference value for design.