Water resource of Tây Nguyên area and solution of harvesting
surface water to artificial recharge groundwater
Đoàn Văn Cánh, Nguyễn Thị Thanh
Thủy, Đào Đình Thuần,
Đặng Đức Nhận, Ngô Tuấn Tú, Đặng Đức Long
Nguyên is a large plateau located in the west of South Trung Bộ region. It
includes the whole territory of Kon Tum, Gia Lai, Đăk Lăk, Đăk Nông and Lâm Đồng
Provinces and has a total
area of 54,473.79 km2. The average rainfall in Tây Nguyên is 84.81-93.79
billion m3/year. The river system is composed of Xê Xan, Xrêpôk, Ba
and Đồng Nai rivers, obtaining a discharge of about 49 billion m3/year.
The rainfall creates a groundwater flow of about 6.61 billion m3/year.
However, depending on period of the year the surface flow in Tây Nguyên changes
variously and in the dry season, the flow is about one tenth (1/10) of rainy
season. As statistical evidence, the surface flow fluctuates according to
season. Therefore, in the rainy season there is flood not only in the lower
course of rivers, but also in the upper course. On the contrary, in the dry
season drought appears everywhere. Aiming to contribute in the elimination of this
unreason, the authors of this article proposes some methods to protect groundwater sources from depletion,
to transfer surface water in the rainy season to the dry season, such as
construction of dam and reservoirs to harvest rainwater, to prevent groundwater
discharge and to realize artificial recharge of groundwater in the dry season through
boreholes. The report presents also a case study in the Bảo Lộc area.
Người biên tập: Võ Công Nghiệp