Significance of Antecedent Soil Moisture to a Semiarid Watershed Rainfall-Runoff Relation

Autor:	Chery, D. L., Jr.
Rok vydání:	1972
Předmět:	Hydrology Arizona. Water resources development Southwestern states. Antecedent moisture content Soil moisture Rainfall-runoff relationships Streamflow Arid lands Peak discharge Runoff Hydrologic data Watersheds (basins) Statistical methods New Mexico Southwest U.S.
Druh dokumentu:	Proceedings<br />Text
ISSN:	0272-6106
Popis:	From the Proceedings of the 1972 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - May 5-6, 1972, Prescott, Arizona Numerous reports from the southwest claim that soil moisture prior to rainfall-runoff event has no influence on the resulting flow volumes and peak rates. Runoff occurs from many storms that would not be expected to produce runoff, and an explanation lies in the occurrence of antecedent rains. This hypothesis is tested by dividing runoff events into 2 subsets--one with no rain within the preceding 120 hours, and the other with some rain within the preceding 24 hours--and to test the null hypothesis. The hypothesis was tested with rainfall and runoff data from a 40-acre agricultural research service watershed west of Albuquerque, New Mexico, using the Wilcoxon's rank sum test. Various levels of statistical significance are discussed, and shown graphically, to conclude conclusively that antecedent rainfall influences runoff from a semiarid watershed.
Databáze:	Networked Digital Library of Theses & Dissertations
Externí odkaz:	http://hdl.handle.net/10150/300259 Zobrazit plný text záznamu