THE ANALYSIS OF THE CROPWAT MODEL EFFICIENCY ESTIMATING WATER REQUIREMENT OF WHEAT IN THE WEST OF KERMANSHAH TOWNSHIPS OF THE ISLAMABAD GHARB, SARPOL ZAHAB AND RAVANSAR

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LASHKARI H.; KEYKHOSRAVI GH.; REZAEI A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Spatial Planning Year:2009 | Volume:13 | Issue:1 (60) Page(s): 247-270

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Title

THE ANALYSIS OF THE CROPWAT MODEL EFFICIENCY ESTIMATING WATER REQUIREMENT OF WHEAT IN THE WEST OF KERMANSHAH TOWNSHIPS OF THE ISLAMABAD GHARB, SARPOL ZAHAB AND RAVANSAR

Author(s)

LASHKARI H. | KEYKHOSRAVI GH. | REZAEI A. | Issue Writer Certificate

Keywords

EVAPOTRANSPIRATIONQ3

WHEATQ2

WATER REQUIREMENTQ3

WEST KERMANSHAHQ2

CROPWATQ2

Abstract

In this study, the EVAPOTRANSPIRATION and WATER REQUIREMENT of WHEAT for the townships Islamabad Gharb, Sarpole Zahab and Ravansar were determined in 18 years from 1988 to 2005.At first, using the average of long-term, the period climatogical data (temperature and rainfall) of dry and we (period for three stations were determined. The dry period length in this ''region which lasts from the early spring to the mid fall is coincided with the harvest time and WHEAT sensitivity to water shortage.Thus there is a need to supplementary irrigation. Hence, a large part of this region that is cultivated by rainfall cultivation has to be irrigated by underground water.Accordingly, it results in a severe decrease of surface aquifer in the lands of the region.Then, using the CROPW AT model, the real EVAPOTRANSPIRATION of WHEAT and its water and irrigation requirement in the region was studied. The arerage of climate data (maximum and minimum temperature, monthly rainfall, wind speed, relative humidity and dally sunshine) as well as, the cultivation model of the crop (including Kc values, stage days, root depth, depletion fraction) and the area planted (0-100% of the total area), soil type, total available soil moisture, initial soil moisture (% of total available moisture) were entered in to the model and in stage the results were represented as chart and graph. Finally the timetable of irrigation was designed soil moisture deficit in real in the growth period was comparatively obtained.Further, WATER REQUIREMENT, irrigation and EVAPOTRANSPIRATION rates were depicted in the growing term as a graph.According to results of the irrigation schedule table station and according to severe aridity and moisture deficit in the soil, two or three supplementary irrigations are needed to prepare the crop for harvesting.

Cites

IMPACT OF TEMPERATURE ON COTTON CROP WATER REQUIREMENT IN SABZEVAR

References

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APA: Copy

LASHKARI, H., KEYKHOSRAVI, GH., & REZAEI, A.. (2009). THE ANALYSIS OF THE CROPWAT MODEL EFFICIENCY ESTIMATING WATER REQUIREMENT OF WHEAT IN THE WEST OF KERMANSHAH TOWNSHIPS OF THE ISLAMABAD GHARB, SARPOL ZAHAB AND RAVANSAR. SPATIAL PLANNING (MODARES HUMAN SCIENCES), 13(1 (60)), 247-270. SID. https://sid.ir/paper/171840/en

Vancouver: Copy

LASHKARI H., KEYKHOSRAVI GH., REZAEI A.. THE ANALYSIS OF THE CROPWAT MODEL EFFICIENCY ESTIMATING WATER REQUIREMENT OF WHEAT IN THE WEST OF KERMANSHAH TOWNSHIPS OF THE ISLAMABAD GHARB, SARPOL ZAHAB AND RAVANSAR. SPATIAL PLANNING (MODARES HUMAN SCIENCES)[Internet]. 2009;13(1 (60)):247-270. Available from: https://sid.ir/paper/171840/en

IEEE: Copy

H. LASHKARI, GH. KEYKHOSRAVI, and A. REZAEI, “THE ANALYSIS OF THE CROPWAT MODEL EFFICIENCY ESTIMATING WATER REQUIREMENT OF WHEAT IN THE WEST OF KERMANSHAH TOWNSHIPS OF THE ISLAMABAD GHARB, SARPOL ZAHAB AND RAVANSAR,” SPATIAL PLANNING (MODARES HUMAN SCIENCES), vol. 13, no. 1 (60), pp. 247–270, 2009, [Online]. Available: https://sid.ir/paper/171840/en

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