WA + water accounting approach in the analysis of supply and demand of water resources and hydro-climatology balance (Case study: Plasjan basin)

Document Type : Research Paper

Authors

1 Ph.D. Student in Water Resources, Department of Irrigation and Drainage Engineering, Abu Reihan Campus, University of Tehran, Tehran, Iran.

2 Associate Professor, Department of Irrigation and Drainage Engineering, Abu Reihan Campus, University of Tehran, Tehran, Iran.

3 Assistant Professor, Water Research Institute of the Ministry of Energy, Tehran, Iran.

Abstract

Water accounting is one of the important approaches to formulate the water cycle and quantitative changes in various dimensions. Therefore, a framework that can quantify the hydrological cycle as standard, as well as a framework that estimates the hydrological processes of the basin in such a way that managed and manageable flows include land use interaction are essential. WA + framework as one of the water accounting methods using remote sensing analyzes the various parameters at the level of a basin. The aim of this study was to analyze the parameters of the hydro-climatological balance using the WA + framework to calculate the three sheets of resource base, evapotranspiration and withdrawal of water resources. According to the volume of 604 MCM inflow, it was determined that 465.5 MCM is used for evapotranspiration and according to the return flow of the basin, 38.8 MCM is used for infiltration and 59.7 MCM is used for runoff in the region. The results obtained from the hydro-climatological balance using the WA + framework showed that due to the same consideration of precipitation, the rate of evapotranspiration in this framework increases compared to the computational method and constitutes about 74 percent of the output volume of the balance. The amount of infiltration and runoff obtained in these conditions is less than the computational method. The results obtained from the water accounting framework showed that this approach can reduce the uncertainty of the input parameters to the hydro-climatology balance.

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References

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Water and Irrigation Management
Volume 12, Issue 1
April 2022
Pages 187-199

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