Study on development a tool for computing water equirement satisfaction index of crop and application to warning drought in An Giang province

The report presents the use guidelines for computing crop water requirements of FAO to develop a Water Requirement Satisfaction Index (WRSI) tool for crops. This tool has been developed based on the platform of Microsoft Excel software, the programming language is Visual Basic. The results of applying this tool with meteorological data series in An Giang province shows that the level of water satisfaction of Dong Xuan rice crop is 28%, corn is 16%, while the Mua rice crop is 92%, corn is 98%. Therefore, it can be seen that the role of irrigation in the Dong Xuan crop is important. When using the WRSI tool with meteorological data daily, the need for irrigation to replace the shortage of rainfall can be determined, so drought can be warned. The WRSI tool is not only applicable in An Giang province but it can also be applied to other localities.

1. Introduction

2. Data and Methods

2.1. Data

2.2. Methods

2.3. Technical

3. Results

3.1 WRSI tool

3.2. Application to warn of rice crop failure due to water shortage in An Giang

4. Conclusion

REFEREENCES

[1] Verdin, J., and R. Klaver, 2002: Grid-cell-based crop water accounting for the famine early warning system. Hydrol. Processes, 16, 1617–1630

[2] Allen R.G, L.S. Pereira, Dirk Raes and D and Smith.M (1998), Crop Evapotranspiration. Guidelines for computing crop water requirements FAO Irrigation and Drainage Paper No. 56. FAO, ROME.

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Bui Chi Nam, Ngo Sy Giai, Phan Thi Anh Tho, Pham Thanh Long
Viet Nam Institute of Meteorology, Hydrology and Climate Change

International conference water resources research on water resources security,
disaster prevention and climate change adaptation