Management of Peatland in the Mekong River Delta of Vietnam

Le, Quoi Phat; Le, Thuyen Xuan

doi:10.1007/978-981-33-4654-3_29

Cited by 3 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Floods in the rainy season and salinity intrusion in the dry season are the two main challenges in the VMD [66]. During the rainy season (May to November), high rainfall in the Mekong River basin causes flooding in the mainstream of the Mekong River and the Mekong Delta.…”

Section: Study Areamentioning

confidence: 99%

“…Inundation of one third of the delta can last up to 3 months [37]. The population in the VMD has extensive experience in living with floods [67,68], and people have generally adapted their lives to their presence [33,66]. In the dry season under the influence of tides, salinisation and the lack of fresh water in coastal areas are the problems to be addressed [66].…”

Section: Study Areamentioning

confidence: 99%

“…The population in the VMD has extensive experience in living with floods [67,68], and people have generally adapted their lives to their presence [33,66]. In the dry season under the influence of tides, salinisation and the lack of fresh water in coastal areas are the problems to be addressed [66]. Located in the low-lying coastal zone, the tidal effects cause salinity intrusion to penetrate far inland, making salinisation intrusion worse during the dry season [53,69].…”

Section: Study Areamentioning

confidence: 99%

See 2 more Smart Citations

Ecosystem Service Modelling to Support Nature-Based Flood Water Management in the Vietnamese Mekong River Delta

et al. 2021

View full text Add to dashboard Cite

Deltas are among the most productive and diverse global ecosystems. However, these regions are highly vulnerable to natural disasters and climate change. Nature-based solutions (Nbs) have been increasingly adopted in many deltas to improve their resilience. Among decision support tools, assessment of ecosystem services (ES) through spatially explicit modelling plays an important role in advocating for Nbs. This study explores the use of the Land Utilisation and Capability Indicator (LUCI) model, a high-resolution model originally developed in temperate hill country regions, to map changes in multiple ecosystem services (ES), along with their synergies and trade-offs, between 2010 and 2018 in the Vietnamese Mekong Delta (VMD). In so doing, this study contributes to the current knowledge in at least two aspects: high-resolution ES modelling in the VMD, and the combination of ES biophysical and economic values within the VMD to support Nbs implementation. To date, this is the highest resolution (5 by 5 m) ES modelling study ever conducted in the VMD, with ~1500 million elements generated per ES. In the process of trialling implementations of LUCI within the VMD’s unique environmental conditions and data contexts, we identify and suggest potential model enhancements to make the LUCI model more applicable to the VMD as well as other tropical deltaic regions. LUCI generated informative results in much of the VMD for the selected ES (flood mitigation, agriculture/aquaculture productivity, and climate regulation), but challenges arose around its application to a new agro-hydrological regime. To address these challenges, parameterising LUCI and reconceptualising some of the model’s mechanisms to specifically account for the productivity and flood mitigation capability of water-tolerant crops as well as flooding processes of deltaic regions will improve future ES modelling in tropical deltaic areas. The ES maps showed the spatial heterogeneity of ES across the VMD. Next, to at least somewhat account for the economic drivers which need to be considered alongside biophysical valuations for practical implementations of ES maps for nature-based solutions (Nbs) in the upstream VMD, economic values were assigned to different parcels using a benefit transfer approach. The spatially explicit ES economic value maps can inform the design of financing incentives for Nbs. The results and related work can be used to support the establishment of Nbs that ultimately contribute to the security of local farmers’ livelihoods and the sustainability of the VMD.

show abstract

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

See 1 more Smart Citation

Ecosystem Service Modelling to Support Nature-Based Flood Water Management in the Vietnamese Mekong River Delta

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Rising sea levels (Wassmann et al, 2004), tidal uctuations and decreased river ow (Dang et al, 2015) allow the intrusion of saline water inland through the Vietnamese Mekong River Delta (MRD). Variability to once stable rainfall patterns create dry season temporal and spatially varied environmental conditions across the nearly 4 million hectares of MRD (Le and Wyseure, 2007) with combinations of waterlogging, drought, and salinity occurring from February to June (Kaveney et al 2023). Farmers in saline affected areas adjacent to the coastline (Nguyen et al, 2020a) often have to irrigate rice crops with saline water exceeding 7 dS m − 1 (Loc et al, 2021), despite the implementation of canal sluice gates to try and limit saline intrusion (MARD, 2020).…”

Section: Introductionmentioning

confidence: 99%

Suitability of soybean, cowpea and quinoa for conditions of climate change in the Vietnamese Mekong Delta dry season

Kaveney,

Khoi,

Minh

et al. 2024

Preprint

View full text Add to dashboard Cite

Background Saline intrusion and freshwater scarcity is occurring across regions of the Mekong River Delta Vietnam which is driving the need to identify suitable alternative crops that are fast maturing, water efficient and/or saline tolerant.Methods A glasshouse trial examined the suitability of quinoa (Chenopodium quinoa Kruso white), cowpea (Vigna unguiculata Red Caloona) or soybean (Glycine max Richmond) for growth in regions affected by salinity and drought. Plants were irrigated with either fresh or saline (up to 4 g L− 1) water. Chameleon soil moisture sensors were used to trigger irrigation events, either constantly (water potential 0 to -22 kPa) or intermittently (irrigating when the water potential was <‒50 kPa).Results Saline treatments significantly affected the yield of all three species; however, quinoa grew in saline conditions for the longest duration. Cowpea was negatively affected by intermittent irrigation causing decreased yield higher proline concentrations in younger leaves. Quinoa had the lowest daily water use whilst soybean had the highest daily water consumption. Cowpea and quinoa tolerated irrigation with 4 g L− 1 during reproductive phases, whilst soybean experienced leaf chlorosis and premature senescence with saline irrigation.Conclusion Quinoa may be suitable for growth in saline and water limited affected areas of the MRD, soybean suitable for areas where saline intrusion or freshwater scarcity is not a problem, and cowpea suitable for saline affected areas provided irrigation supply is available to match plant demand. Chameleon sensors can improve water use and be used to aid farmers in developing irrigation schedules.

show abstract

“…The Mekong River Delta in southern Vietnam is one such example. As saline and brackish water have replaced fresh water in coastal rivers and streams (Nguyen and Savenije 2006; Le et al 2007; To 2014; Tran et al 2014, 2019; Hanington et al 2017), groundwater has become the second‐most accessible resource for supplying the region's growing population. Additional impacts to surface water resources posed by developing upstream hydroelectric impoundments (Hecht et al 2018) are expected to place even greater importance on groundwater.…”

Section: Introductionmentioning

confidence: 99%

An Application of HFE‐D for Evaluating Sea Water Intrusion in Coastal Aquifers of Southern Vietnam

Lertsirivorakul

Bui

et al. 2020

Groundwater

View full text Add to dashboard Cite

The coastal aquifers and inland waters of the Long Xuyen Quadrangle and Ca Mau Peninsula of southern Vietnam have been significantly impacted by sea water intrusion (SI) as a result of recent anthropogenic activities. This study identified the evolution and spatial distribution of hydrochemical conditions in coastal aquifers at this region using Hydrochemical Facies Evolution Diagram (HFE‐D) and Geographical Information System mapping. Hydraulic heads and water chemistry were measured at 31 observation wells in four layered aquifers during dry and rainy seasons in early (2005), and more recent (2016), stages of agricultural development. Hydrochemical facies associated with intrusion or freshening stages were mapped in each aquifer after assigning mixing index values to each facies. The position of groundwater freshening and SI phases differed in Holocene, Upper Pleistocene, Middle Pleistocene, and Lower Pleistocene aquifers. The geographic position of freshening and intrusion fronts differ in dry and rainy seasons, and shifted after 11 years of groundwater abstraction in all four aquifers. The spatial and temporal differences in hydrochemical facies distributions according to HFE‐D reflect the relative impact of SI in the four aquifers. The study results provide a better understanding of the evolution of groundwater quality associated with SI in a peninsular coastal aquifer system, and highlight the need for improving groundwater quality and management in similar coastal regions.

show abstract

Management of Peatland in the Mekong River Delta of Vietnam

Cited by 3 publications

References 16 publications

Ecosystem Service Modelling to Support Nature-Based Flood Water Management in the Vietnamese Mekong River Delta

Ecosystem Service Modelling to Support Nature-Based Flood Water Management in the Vietnamese Mekong River Delta

Suitability of soybean, cowpea and quinoa for conditions of climate change in the Vietnamese Mekong Delta dry season

An Application of HFE‐D for Evaluating Sea Water Intrusion in Coastal Aquifers of Southern Vietnam

Contact Info

Product

Resources

About