摘要
利用黄河中游地区降水资料,统计分析了黄河中游近50年降水变化特点,建立了天然年径流量计算公式,计算分析了降水变化对径流量的影响。结果表明,由于1986年以来降水量较前期减少明显,使得1986年以来天然年径流量较前期减少近20%,尤其1994年以来最甚,平均每年减少66.5亿m3。
The paper analyzes the characteristics of precipitation variation in the last 50 years in the middle Yellow River, establishes a calculation formula of annual natural flow and analyzes the influence of the precipitation variation on runoff by using the data of precipitation of the middle Yellow River. The results are shown that since 1986, the annual natural flow is reduced about 20% than that of the early days, especially since 1994, the mean annual reduction is 6650 million m^3 due to the obvious reduction of precipitation.
出处
《人民黄河》
CAS
北大核心
2004年第8期26-28,共3页
Yellow River
基金
水利部科技创新项目(SCX2002-18)。
