期刊
JOURNAL OF HYDROLOGIC ENGINEERING
卷 10, 期 3, 页码 205-215出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)1084-0699(2005)10:3(205)
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To grasp the temporal and spatial distribution characteristics of the pan evaporation amount in the Chao Phraya River basin, in the Kingdom of Thailand, the writers performed an analysis over a period of 19 years, from 1982 to 2000, where data related to the target area were available. Geographic, seasonal, and annual changes were studied. As a result of performing trend tests on annual changes, negative trends were found in 24 out of 27 observation stations. Furthermore, nine of those locations had a significant negative trend. As a result of performing tests of concurrent rainfall over the same period, although there were positive trends in 8 locations and negative trends in 19 locations, no significant trend-either positive or negative-was obtained. This result does not match a finding that precipitation increase decreases pan evaporation in the United States, a finding that can be derived from the complementary relationship.
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