THE CHANGING RAINFALL RESOURCES OF SUDAN

被引：34
作者：
HULME, M
机构：
来源：
TRANSACTIONS OF THE INSTITUTE OF BRITISH GEOGRAPHERS | 1990年 / 15卷 / 01期
关键词：
D O I：
10.2307/623090
中图分类号：
P9 [自然地理学]; K9 [地理];
学科分类号：
0705 ; 070501 ;
摘要：
Rainfall depletion has been most severe in semi-arid central Sudan where between 1921-50 and 1956-85 annual rainfall has declined by 15%, the length of the wet season has contracted by three weeks, and rainfall zones have migrated southwards by between 50 km and 100 km. This depletion has been due more to a reduction in the frequency of rain events rather than to a reduced rainfall yield per rain event. Three aspects of Sudan rainfall information availability are discussed in the light of recent developments: historical archived data, automatic, near real-time rainfall monitoring, and both seasonal and decadal rainfall forecasting. -from Author
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页码：21 / 34
页数：14
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