Title: Temporal and Spatial Precipitation Distribution in the HeiheCatchment, Northwest China, During the Past 40 a
Abstract: The paper summaries temporal andspatial distributive characteristics of precipitation forthe Past 40 a at the Heihe catchment. Spatially, precipitation tends to increase obviously from northwest tosoutheast. However, the tendency appears to have difference between the alpine and plain areas and between the east and west. Vapor source is also differentbetween the east and west, which may be divided at99.5 E, so that distribution of monthly precipitationappears to be different in the eastern and the westernareas of the catchment. Longitudinally, precipitationincreases from north to south. Change of precipitation with altitude is different in the west and east ofthe catchment, precipitation appears to increaselinearly in the west and non-linearly in the east,which leads maximum precipitation at 2400~3000m. Based on distribution of precipitation, the paperdiscusses difference and connection of precipitationfor various seasons in alpine and plain, and easternand western areas. Change of precipitation series forthe various areas is also analyzed. In the past 40 a,change of precipitation tends to be similar in alpineand plain areas, and eastern and western areas of thecatchment it shows to have two different stages ofchange that is divided at the beginning of 1980. Precipitation tends to decrease markedly since 1980.
Publication Year: 1999
Publication Date: 1999-01-01
Language: en
Type: article
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Cited By Count: 6
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