TY  - JOUR
T1  - Calculation of Rice Water Requirement for An Giang Province
Under the Impacts of Climate Variability
AU - An Dang, Truong AU - Hao Lam, Van 
JO  - Research Journal of Soil and Water Management
VL  - 10
IS  - 1
SP  - 1
EP  - 7
PY  - 2019
DA  - 2001/08/19
SN  - 2075-1095
DO  - rjswm.2019.1.7
UR  - https://makhillpublications.co/view-article.php?doi=rjswm.2019.1.7
KW  - Irrigation water
KW  -Crop Model
KW  -effective rainfall
KW  -water scarce
KW  -climate change
KW  -food security
AB  - The study area is one of the important agricultural areas in the Mekong Delta of Vietnam. It has an
important contribution in term of food security and economic development in Vietnam. In recent years, this area
has seriously impacted by salinization, drought due to the impact of climate change leading to the irrigation
water scarce for agricultural production. Therefore, the accurate estimation of irrigation water requirements is
very necessary and especially in the context of the climate variability. The aim of this study was to define
irrigation water requirement, net irrigation requirements and to conduct efficient irrigation schedule for improved
irrigation practices order to provide information necessary in taking decisions on irrigation management under
the impacts of climate change. This study is conducted applying the CORPWAT crop model based on
meteorological factors recorded from 2004-2015. The simulated results showed that the crop water demand of
the Winter-Spring, Summer-Autumn and crop water demand cropsvarying from 0.0-176.8 mm/dec. The high crop
water demand was recorded in the Winter-Spring, Summer-Autumn crops (from 593.4-827.8 mm) and lower was
observed in the Autumn-Winter crop (236.3 mm). The highest Crop Water Demand (CWD) values of
Winter-Spring, Summer-Autumn crop was occurred from the mid-second decade to the end of the third decade
and the lowest CWD value was close to zero on the four decades to the mid-sixth decade of the Autumn-Winter
crop.The simulation results showed that CORPWAT crop model can be successfully applied to define reference
Evapotranspiration (ET ), actual Evapotranspiration (ET ), Effective Rainfall (ER), CWD and irrigation o C
conditions with reasonable accuracy.
ER  -