DIFFERENCES BETWEEN MODELED SURPLUS AND USGS‐MEASURED DISCHARGE IN LAKE PONTCHARTRAIN BASIN, LOUISIANA1
作者:
Robert V Rohli,
John M. Grymes,
期刊:
JAWRA Journal of the American Water Resources Association
(WILEY Available online 1995)
卷期:
Volume 31,
issue 1
页码: 97-107
ISSN:1093-474X
年代: 1995
DOI:10.1111/j.1752-1688.1995.tb03367.x
出版商: Blackwell Publishing Ltd
关键词: water resources geography;climatic water balance;hydroclimatology;surface water hydrology;water surplus;river discharge;Louisiana
数据来源: WILEY
摘要:
ABSTRACT:A one‐layer decreasing‐availability monthly water balance model is used to estimate monthly surplus that flows into the Lake Pontchartrain Basin from the Amite, Tickfaw, Natalbany, Tangipahoa, and Tchefuncte Rivers for water years 1949 through 1990. The modeled annual surplus for each drainage basin is compared to gauged annual discharge obtained from the United States Geological Survey. This provides an estimate of the differential success of the model over watersheds of various sizes, and also suggests appropriate adjustment factors to be used in future water balance analyses of similar basins in humid subtropical climate regions. Results show that annual surplus values agree well with the USGS values, after an annual adjustment of about 140 mm (11 to 28 percent of the basin surplus) is subtracted from the annual modeled totals to compensate for overestimation by the model. However, inter‐annual variability is high in the annual cycles. Winter and spring discharges can also be modeled success
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