Effective management for acidic pollution in the canal network of the Mekong Delta of Vietnam: A modeling approach

Phong, Ngo Dang; Hoanh, Chu Thai; Tuong, To Phuc; Malano, Hector

doi:10.1016/j.jenvman.2013.11.049

Cited by 10 publications

(3 citation statements)

References 16 publications

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“…In the coastal area of the Mekong delta in Vietnam, the water quality was very poor due to the multiple impacts from upstream in combination with the effect of sea water intrusion. Many studies have identified the degradation of water quality in the canals built in the Mekong delta [ 13 , 14 , 64 , 65 ]. Consequently, the pollution will become exacerbated in these areas under the intensive stress of population growth, industrialization, agriculture and tourism, which require food production and economic growth.…”

Section: Discussionmentioning

confidence: 99%

Evidence of Water Quality Degradation in Lower Mekong Basin Revealed by Self-Organizing Map

2016

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To reach a better understanding of the spatial variability of water quality in the Lower Mekong Basin (LMB), the Self-Organizing Map (SOM) was used to classify 117 monitoring sites and hotspots of pollution within the basin identified according to water quality indicators and US-EPA guidelines. Four different clusters were identified based on their similar physicochemical characteristics. The majority of sites in upper (Laos and Thailand) and middle part (Cambodia) of the basin were grouped in two clusters, considered as good quality water with high DO and low nutrient levels. The other two clusters were mostly composed of sites in Mekong delta (Vietnam) and few sites in upstream tributaries (i.e., northwestern Thailand, Tonle Sap Lake, and swamps close to Vientiane), known for moderate to poor quality of water and characterized by high nutrient and dissolved solid levels. Overall, we found that the water in the mainstream was less polluted than its tributaries; eutrophication and salinity could be key factors affecting water quality in LMB. Moreover, the seasonal variation of water quality seemed to be less marked than spatial variation occurring along the longitudinal gradient of Mekong River. Significant degradations were mainly associated with human disturbance and particularly apparent in sites distributed along the man-made canals in Vietnam delta where population growth and agricultural development are intensive.

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Section: Discussionmentioning

confidence: 99%

Evidence of Water Quality Degradation in Lower Mekong Basin Revealed by Self-Organizing Map

2016

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“…After the normalization of the secondary channel, the total area of the flooded was reduced to 781.80 hectares, with a flooded area of more than 20 cm is 235.26 hectares. Normalization scenarios could improve drainage capability [13]. This scenario can reduce the flooded area by more than 20 cm, about 71.75 hectares or 23.33% of the existing scenario.…”

Section: Study Areamentioning

confidence: 99%

“…gate, the discharge that comes out is not much different from the normalization scenario, which is 50.96 m 3 /s. Channel normalization can increase the amount of outgoing discharge into the channel [13], [14]. The comparison of the water level in the Handil Mambai secondary channel at Sta 3700 and the water level in the paddy fields and inundation depth is shown in Figure 4.…”

Section: Study Areamentioning

confidence: 99%

Evaluation of irrigation network performance at the anjir serapat lowland irrigation area central kalimantan

Revina

Istiarto

Pratiwi

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The Anjir Serapat lowland Irrigation Area in Central Kalimantan is an agricultural area that supports the Food Estate program. Irrigation water comes from rainwater. The existing irrigation network cannot remove excess water during the rainy season, causing inundation in low-lying areas. Stagnant water causes the pH of the water to drop so that it becomes acidic. Acid inhibits the absorption of nutrients, interfering with rice plants’ growth. This study aims to evaluate the performance of irrigation networks in removing excess rainwater. Performance evaluation was carried out with the help of flow simulation using HEC-RAS. The simulation was carried out with three scenarios, namely scenarios with existing geometric conditions, channel normalization scenarios, and normalization scenarios, along with the addition of sluice gates. The normalization scenario and the addition of the sluice gate were more effective in reducing the area of flooded land by more than 20 cm to 158.71 hectares, with a reduction of 48.27% from the existing scenario. For land with lower contours, where not all inundation can be discharged into the channel, it is necessary to add a pump. Further studies are needed to see the effect of adding pumps on the reduction of inundation in the field.

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Mekong River Delta

Van,

Mei,

Mai

2024

Delta Sustainability

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Effective management for acidic pollution in the canal network of the Mekong Delta of Vietnam: A modeling approach

Cited by 10 publications

References 16 publications

Evidence of Water Quality Degradation in Lower Mekong Basin Revealed by Self-Organizing Map

Evidence of Water Quality Degradation in Lower Mekong Basin Revealed by Self-Organizing Map

Evaluation of irrigation network performance at the anjir serapat lowland irrigation area central kalimantan

Mekong River Delta

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