International Conference on Rain Water Cistern Systems
"Rainwater Catchment for Future Generations"
Keelung, Taiwan, R.O.C. - August 1991
4: Hydrological Data and Analysis
Characteristics Of Maximum
Daily,Rainfall On Vietnam And It's Influence On Soil Erosion
Van Tuan, Le Van Lan
Hanoi University, Vietnam
Vietnam is the Tropical country, so its rainfall is high and its periods of
sunlight are long. It's rainfall, especially, daily rainfall is the main cause
of the flood and soil erosion. Studies of maximum daily rainfall serve as a base
estimate flood and soil erosion.
This article expresses the results of the studies undertaken for many years
about rainfall and soil erosion all over Vietnam Consisting of more then 1000
rainfall station with ten years data and data of 40 erosion tanks at Tay Nguyen-central
part of Vietnam and at Vinh Phu province. Also this article mentions the following
- The causes of flood Rain in Vietnam
- Characteristics of an annual Rainfall and maximum daily Rainfall, it's spatial-duration
- Methods for calculating the maximum daily Rainfall.
- Influence of Rainfall on soil erosion and methods of soil erosion estimation
based on maximum daily Rainfall data. Characteristics of maximum daily rainfall
on Vietnam and it's influence on soil erosion
The main causes of flood Rain in Vietnam, Vietnam is the Tropical monsoon country,
so that it's rainfall is very high. Many Researchers (5,6,7,9) show two main factors
that cause flood Rain in Vietnam. They are:
- The action of world air masses (General circulation of air masses and
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