scholarly journals Saltwater intrusion into groundwater systems in the Mekong Delta and links to global change

2021 ◽  
Author(s):  
Han Xiao ◽  
Yin Tang ◽  
Hai-Ming Li ◽  
Lu Zhang ◽  
Thanh Ngo-Duc ◽  
...  
Keyword(s):  
Global Change ◽  
Saltwater Intrusion ◽  
Mekong Delta ◽  
Groundwater Systems

Climate Change and Profit Loss

2020 ◽  
pp. 105-119
Author(s):  
Huynh Viet Khai
Keyword(s):  
Climate Change ◽  
Natural Environment ◽  
Saltwater Intrusion ◽  
Mekong Delta ◽  
Rice Production ◽  
Social Characteristics ◽  
Salinity Intrusion ◽  
Rice Farmers ◽  
The Difference

The chapter aims to evaluate the profit loss of rice farmers due to salinity intrusion by collecting the information of rice production in three regions with the same natural environment conditions, social characteristics (e.g., the same social and farming culture, ethnicity, type of soil), and only differed with respect to the level of salinity in Soc Trang province, one of the most salinity-affected areas in the Vietnamese Mekong Delta. The study estimated the profit loss in rice production due to saltwater intrusion by the difference in rice profit between the non-salinity and salinity regions and showed this loss was about VND 9.3-15.1 million per ha-1 a year.

scholarly journals Impacts of saltwater intrusion on soil nematodes community in alluvial and acid sulfate soils in paddy rice fields in the Vietnamese Mekong Delta

2021 ◽  
Vol 122 ◽  
pp. 107284
Author(s):  
Van Sinh Nguyen ◽  
Minh Khoi Chau ◽  
Quang Minh Vo ◽  
Van Khoa Le ◽  
Thi Kim Phuong Nguyen ◽  
...  
Keyword(s):  
Saltwater Intrusion ◽  
Mekong Delta ◽  
Paddy Rice ◽  
Rice Fields ◽  
Soil Nematodes ◽  
Acid Sulfate Soils ◽  
Acid Sulfate ◽  
Sulfate Soils

Dam-induced riverbed incision and saltwater intrusion in the Mekong Delta

2020 ◽  
pp. 2243-2251
Author(s):  
D.V. Binh ◽  
S. Kantoush ◽  
T. Sumi ◽  
N.P. Mai ◽  
L.V. Trung
Keyword(s):  
Saltwater Intrusion ◽  
Mekong Delta

scholarly journals Soil and Water Quality Indicators of Diversified Farming Systems in a Saline Region of the Mekong Delta, Vietnam

Agriculture ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 38 ◽  
Author(s):  
Lam Van Tan ◽  
Thanh Tran ◽  
Ho Huu Loc
Keyword(s):  
Water Quality ◽  
Quality Indicators ◽  
Saltwater Intrusion ◽  
Coastal Region ◽  
Mekong Delta ◽  
Farming Systems ◽  
Water Levels ◽  
Cropping Patterns ◽  
Water Quality Indicators ◽  
Soil And Water

Saltwater intrusion, a consequence of climate change and decreased water levels, has been increasingly severe in the Mekong Delta region. Thanh Phu District, Ben Tre Province, Vietnam, is a coastal region where agricultural production and local livelihood have been impaired by saltwater intrusion, resulting in the adoption of multiple coping strategies, including rotations and intercropping. This study aims to measure and evaluate soil and water quality indicators of multiple farming systems in Thanh Phu district and contributes to developing suitable cropping patterns. Soil indicators were pH, electrical conductivity, and exchangeable Na+. Water quality characteristics include pH, salinity, dissolved N and P, alkalinity, H2S, and chemical oxygen demand (COD). The results indicated that water pH and salinity were at suitable levels to support the growth of prawn but were below the critical level required to grow black tiger shrimp and white-legged shrimp. Water alkalinity, dissolved N, P, and COD were not constraining for the growth of shrimps. However, a significant concentration of H2S may cause disadvantages for shrimp growth.

scholarly journals Assessing changes in saltwater intrusion in some main rivers of Vinh Long province

2017 ◽  
Vol 1 (T4) ◽  
pp. 265-273
Author(s):  
Tuan Ngoc Le ◽  
Minh Ngoc Phan
Keyword(s):  
Climate Change ◽  
Surface Water ◽  
Water Supply ◽  
Water Samples ◽  
Saltwater Intrusion ◽  
Mekong Delta ◽  
Control Measures ◽  
Current Status ◽  
Inland Waterways ◽  
Surface Water Samples

Saltwater intrusion (SI) associated with El Nino phenomenon is a particularly concerned issue in a period of 2015–2016. Salinity evolutions in the Mekong Delta and Vinh Long province are becoming serious. Therefore, this work aimed at assessing changes in saltwater intrusion in Vinh Long province during recent ten years (2007–2016), including changes in the highest, the lowest, and average salinities. Besides, 19 surface water samples were collected and analyzed to evaluate the current status of salinization in 2016. Results showed that the salinity tends to propagate into the infield, especially in Co Chien River (0.4 to 1.2 ‰), followed by Hau River (0.2 to 0.7 ‰) and other inland waterways (0.3–0.6 ‰), leading to certain impacts on agriculture, aquaculture, and water supply in the local in general. In Vinh Long province, Vung Liem and Tra On districts were relative significantly influenced by SI, requiring suitable control measures, particularly in the context of climate change.

scholarly journals Bayesian merging of numerical modeling and remote sensing for saltwater intrusion quantification in the Vietnamese Mekong Delta

2021 ◽  
Author(s):  
Anh Phuong Tran ◽  
Chien Pham ◽  
Phong Le ◽  
Thanh Thuy Nguyen ◽  
Cuong Tran ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Numerical Simulation ◽  
Numerical Simulations ◽  
Saltwater Intrusion ◽  
Mekong Delta ◽  
Data Sources ◽  
Hybrid Technique ◽  
Landsat Images ◽  
Multiple Data ◽  
Agriculture And Food

Saltwater intrusion has become one of the most concerning issues in the Vietnamese Mekong Delta (VMD) due to its increasing impacts on agriculture and food security of Vietnam. Reliable estimation of salinity plays a crucial role to mitigate the impacts of saltwater intrusion. This study developed a hybrid technique that merges satellite imagery with numerical simulations to improve the estimation of salinity in the VMD. The salinity derived from Landsat images and by numerical simulations was fused using the Bayesian inference technique. The results indicate that our technique significantly reduces the uncertainties and improves the accuracy of salinity estimates. The Nash-Sutcliffe coefficient is 0.73, which is much higher than that of numerical simulation (0.69) and Landsat estimation (0.67). The correlation coefficient between the merged and measured salinity is relatively high (0.75). The variance of the ensemble salinity errors (2.57 ppt) is lower than that of Landsat estimation (3.65 ppt) and numerical simulations (8.69 ppt). The proposed approach in this study shows a great potential to combine multiple data sources of a variable of interest to improve its accuracy and reliability wherever these data are available.

scholarly journals Performance evaluation of Auto-Regressive Integrated Moving Average models for forecasting saltwater intrusion into Mekong river estuaries of Vietnam

2021 ◽  
Author(s):  
Thai Tran Thanh ◽  
Liem Nguyen Duy ◽  
Luu Pham Thanh ◽  
Yen Nguyen Thi My ◽  
Yen Tran Thi Hoang ◽  
...  
Keyword(s):  
Saltwater Intrusion ◽  
Moving Average ◽  
Mekong Delta ◽  
River System ◽  
Mekong River ◽  
Lead Times ◽  
Seasonal Forecasts ◽  
Sowing Time ◽  
Crop Selection ◽  
Auto Regressive

The Mekong Delta is the most severely affected area by saltwater intrusion in Vietnam. Recent studies have focused on predicting this disaster with weekly and decade lead times without many seasonal forecasts, which is important for planning crop selection, crop structure, and sowing time. This study aims to forecast the spatial distribution of saltwater intrusion into the Mekong river estuaries of Vietnam during the dry season of 2021 by integrating Auto-Regressive Integrated Moving Average with Geographic Information System. ARIMA models were trained with a single input of water salinity measurements from 2012 to 2020. Compared to the weekly salinity observations in 2021, these models predicted very well in the My Tho and Ham Luong rivers but unsatisfactory performance in the Co Chien river. The deepest saltwater intrusion will occur between March 19th and April 16th of 2021, when the 4‰ saline front will move the farthest distance of 41,41 and 44 kilometers inland from the sea through My Tho, Ham Luong Co Chien rivers, respectively. The entire river system will be exposed to moderate risk of saltwater intrusion. Freshwater zones decreased significantly to 0.73% of the whole area of Ben Tre province. These findings could provide a valuable scientific foundation for the appropriate management of coastal aquifers to control or reduce saltwater intrusion.

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