Evaluating the variability of runoff curve number with soil moisture content
Other Title(s)
تقييم تغير معامل رقم المنحني للجريان السطحي مع تغير رطوبة التربة
Author
Source
The Arab Journal for Arid Environments
Issue
Vol. 5, Issue 1 (30 Apr. 2012), pp.31-39, 9 p.
Publisher
Arab Centre for the Studies of Arid Zones and Dry Lands
Publication Date
2012-04-30
Country of Publication
Syria
No. of Pages
9
Main Subjects
Earth Sciences, Water and Environment
Topics
Abstract EN
-The curve number (CN) method originally developed by USDA soil conservation services (SCS) is widely used in engineering design water structures, and environmental impact assessment for estimating runoff volume.
Currently the value of curve number is determined from published tables (USDA-SCS,1972) and modified using 5 day antecedent rainfall published in NEH-4 (USDA-SCS, 1985) .
The objective of this study was to investigate the use of antecedent soil rainfall for curve number adjustment .
A dynamic infiltration model (HYDRUS-1D) was used to simulate the temporal variation of soil moisture content.
Curve number values estimated from observed hydrograph were correlated to antecedent soil moisture content.
A strong correlation (r2=0.80) was found between CN values and the natural logarithm of antecedent soil moisture content.
Using Curve number based on antecedent moisture content value improved the estimation of runoff volume greatly compared to the 5-day antecedent rainfall published in NEH-4 (USDA-SCS, 1985).moisture content as an alternative to the 5-day antecedent
American Psychological Association (APA)
Jnad, Ihab. 2012. Evaluating the variability of runoff curve number with soil moisture content. The Arab Journal for Arid Environments،Vol. 5, no. 1, pp.31-39.
https://search.emarefa.net/detail/BIM-612257
Modern Language Association (MLA)
Jnad, Ihab. Evaluating the variability of runoff curve number with soil moisture content. The Arab Journal for Arid Environments Vol. 5, no. 1 (Apr. 2012), pp.31-39.
https://search.emarefa.net/detail/BIM-612257
American Medical Association (AMA)
Jnad, Ihab. Evaluating the variability of runoff curve number with soil moisture content. The Arab Journal for Arid Environments. 2012. Vol. 5, no. 1, pp.31-39.
https://search.emarefa.net/detail/BIM-612257
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 38-39
Record ID
BIM-612257