摘要
根据河口镇－龙门区间汛期逐日降水量资料，统计得到８０年代区间降雨的特点是：总量较前期减少１０％～２０％，是近４０年来降雨量最少的１０年，其中７～９月较前期减少，６月．反有增加。根据综合降雨指标，建立了降雨指标与水沙量的关系式，计算得到降雨变化使水沙量分别减少１４．４％和３９．５％。８０年代水沙较１９５５～１９７０年变化总量中，降雨变化影响与人类活动影响所占的比例：水量分别为３３．３％和６６．７％；沙量分别为６３％和３７％。
ased on the daily precipitation data in flood seasons. the precipitation characteristiCs of this section in the 1980s are figured out as follows: the total value is 10%-20% less as compared with thst of the previous period, which makes this deCade the dtiest of the past 40 years. The precipitation in Jllne increases though it decreases in Jllly-September as c6mpared with that of the previous period. An equation is established, on the basis of the overall precipitation indices, between precipitation indiCes and flow/sedAne-nt, to represent that flow and sedbent are respectively reduced by 14.4 % and 39. 5% as a result of the changed precipitation. with respect of the now and sediment variations in the 1980s as compared with those of the period 1955 to 1970, precipitation and human activities respctively contribute 33. 3% versus 66. 7% to the flow variation and 63% vetsus 37% to the sediment variation.
出处
《人民黄河》
CAS
北大核心
1994年第12期5-9,共5页
Yellow River
关键词
降雨
降水量
水沙变化
80年代
影响
precipitation characteristics, flow/sediment variation, impact, Hekou-Longmen, 1980s
