A model to evaluate intensive vs. extensive irrigation practices for irrigated rice production system in Bangladesh
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A model was developed to evaluate the effects of intensive versus extensive irrigation strategy for rice cultivation in the Ganges-Kobadak Irrigation Project, Bangladesh. The model application indicates that for most tertiary canals in the project, the respective service areas can not be intensively irrigated in either of the two main rice seasons (Aus and Aman) without significantly increasing canal flows. The model-estimated irrigated areas by tertiary canals were in close agreement with actual values for both the Aus (early summer) and Aman (autumn) rice seasons. However, the agreement was better for the Aus season than for the Aman season which received much more rainfall. The model can be used for determining irrigation water allocation and distribution targets for various parts of a rice irrigation system for given flows under different field water management conditions.
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