TAILIEUCHUNG - Using isotope technique to estimate groundwater recharge in the Red river delta plain

The Red river delta plain is the second largest delta in Vietnam and is located in the North of the country with an area of 14,860 km² and residing more than million inhabitants. Groundwater is mainly exploited in Quaternary sedimentary aquifers with a total discharge of about 3 million m3 /day. | BÀI BÁO KHOA HỌC USING ISOTOPE TECHNIQUE TO ESTIMATE GROUNDWATER RECHARGE IN THE RED RIVER DELTA PLAIN Le Viet Hung1 Pham Quy Nhan1 Tran Thanh Le1 Dang Duc Nhan2 Abstract The Red river delta plain is the second largest delta in Vietnam and is located in the North of the country with an area of 14 860 km and residing more than million inhabitants. Groundwater is mainly exploited in Quaternary sedimentary aquifers with a total discharge of about 3 million m3 day. Some localities have shown signs of over-exploitation such as in Hanoi and in Nam Dinh which may lead to related problems such as depletion subsidence saltwater intrusion and water pollution. In order to be able to sustainably exploit groundwater the groundwater recharges need to be estimated. There have been many studies referring to different methods of estimating the groundwater recharge in which the most effective one is the isotope technique. Field trip and water sampling for chemical compositions stable isotopes 18O 2H and radioactive 3H analysis were also implemented. Ground recharge rate in the range from 77 to 440 mm year was estimated by using isotope analysis and interpretation Keywords Groundwater recharge Red river delta plain stable isotopes 18O 2H radioactive isotope 3H. 1. INTRODUCTION the place with the largest population density in the The groundwater recharge of a certain area is a country MPI 2020 . Groundwater is a valuable fundamental component of the balance of a certain resource that has been exploited quite a lot in this catchment which contributes to the sustainable region with total exploitation discharges of about exploitation of water resources in general and 3 000 000 m3 day MONRE 2015 . Many groundwater in particular. It is hard to measure problems such as ground subsidence pollution directly so Lerner et al. 1990 Scanlon et al. depletion and saltwater intrusion related to 2002 reviewed numerous methods ranging groundwater have also occurred in this area . widely in .

• Môi trường
• Groundwater recharge
• Red river delta plain
• Stable isotopes
• Water resources
• Saltwater intrusion
• Artificial recharge
• Check dam
• Groundwater level
• Recharge shaft
• Recharge borewell
• The impacts of climate change on groundwater resources
• Climate change on groundwater resources
• Groundwater flow and transportation models
• Groundwater recharge Ca Mau peninsula
• The recharge outputs calculated
• Recharge using water
• Fluctuation method
• Water table fluctuation method
• Chennai for analysis
• Prcipitation runoff modeling
• Modular groundwater flow
• Hanoi City
• Natural recharge
• Groundwater management
• Recharge estimation
• Comparison of methods
• Empirical formula
• Sirumugai area of coimbatore
• Groundwater recharge estimation
• Tạp chí khoa học
• Finite element method
• Estimation of lag time of rainfall recharge
• Holocene groundwater aquifer
• Hung Yen province
• Finite element modeling
• Geo Informatics
• Groundwater recharge zones
• Remote sensing
• Thematic layers
• Geo spatial techniques
• Kharif fallow
• Kharif fallow utilization
• Semi critical stage
• Critical stage
• Ground water
• Fluctuation of vadrapalem village
• Madakasira mandal
• During pre monsoon
• Agricultural production
• Rainwater harvesting
• Water shortage
• Groundwater recharge potential
• Protecting groundwater resources
• Monitoring data
• Isotope hydrological techniques
• Underground water
• Ground water recharge
• Water table fluctuation
• Small ravine watershed
• Semi arid region of India
• Increasing demands of water
• Surface water
• Recharge rates
• Modflow model to assess
• Groundwater availability
• Dong Nai basin
• Crop/Irrigation water requirement
• Coping strategies
• Climate change impact
• Water availability