Evaluation of irrigation schemes for sugarcane in Sindh, Pakistan, using SWAP93.

Book Title: NA
Year Published: 2002
Month Published: NA
Author: Qureshi, S. A. ; Madramootoo, C. A. ; Dodds, G. T.
Book Group Author: NA
Abstract:

A computer simulation model, SWAP93, was used to simulate the soil water balance of sugarcane (Saccharum officinarum) over a period of 6 years, in order to develop an efficient irrigation scheduling scheme for Sindh, Pakistan. Given the limitations and inflexibility of the existing warabandi irrigation system, which does not allow on-demand irrigation, only irrigation depth and irrigation interval were varied in order to assess the best irrigation depth/interval combination for sugarcane production. Twelve irrigation treatments were simulated. These treatments were four irrigation amounts (900, 1200, 1650 and 1800 mm) and three irrigation frequencies (7, 10 and 15 days). Three seasons with rainfall totalling less than 20 mm were compared with three seasons of over 200 mm rainfall. Two approaches were used in assessing the irrigation schemes: yield parameters and water management response indicators. Treatment parameters (e.g. irrigation amounts, weather conditions, soil characteristics, etc.) served as input for SWAP93, actual transpiration was calculated and then used in a crop water production function to predict yield and water use efficiency. Additionally, water management response indicators were derived from model outputs, and used to assess the impact of the schemes on soil salinity and water logging. Both these indicators and the yield and water use efficiency indicated that a seasonal total of 1650 mm, applied at a 15-day interval was the best irrigation scheme for the region.

Pages: 37 - 48
URL: http://0-search.ebscohost.com.catalog.library.colostate.edu/login.aspx?direct=true&AuthType=cookie,ip,url,cpid&custid=s4640792&db=lah&AN=20023014402&site=ehost-live
Volume: 54
Number: 1
Journal: Agricultural Water Management
Journal ISO: NA
Organization: NA
Publisher: NA
ISBN: NA
ISSN: 0378-3774
DOI: NA
Keywords:

irrigation scheduling, irrigation systems, leaching,simulation models, soil salinity, soil water balance, sugarcane,transpiration, water use efficiency, waterlogging, Pakistan, Saccharum,Saccharum officinarum, Poaceae, Cyperales, monocotyledons, angiosperms,Spermatophyta, plants, eukaryotes, Saccharum, South Asia, Asia,Developing Countries, Commonwealth of Nations, Field Crops (FF005) (NewMarch 2000), Plant Water Relations (FF062), Soil Chemistry andMineralogy (JJ200), Soil Water Management (Irrigation and Drainage)(JJ800) (Revised June 2002) [formerly Soil Water Management],Mathematics and Statistics (ZZ100)

Source: EBSCO
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