Climate change impacts on rice productivity in the Mekong River Delta

Kontgis, Caitlin; Schneider, Annemarie; Özdoğan, Mutlu; Kucharik, Christopher J.; Trí, Văn Phạm Đăng; Duc, Nguyen Hong; Schatz, Jason

doi:10.1016/j.apgeog.2018.12.004

Cited by 99 publications

(50 citation statements)

References 51 publications

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“…Changes in flood patterns, salinity, and water levels intrusion did not have any impact on rice production [21]. Although climate change might strongly influence rice production [65], the dam construction negatively affects rice production in the LMB, and current government policies prohibit rice paddy farmers adapting to these changes [72]. Mainuddin and Kirby [73] indicated that there is a requirement of crop production stabilization projected to the increase of population by 2030.…”

Section: Impact On Rice Productionmentioning

confidence: 99%

Impacts of Mainstream Hydropower Dams on Fisheries and Agriculture in Lower Mekong Basin

et al. 2020

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The riverine ecosystems of the Mekong River Basin possess the world’s most productive inland fishery and provide highly productive food crops for millions of people annually. The development of hydropower potential in the Mekong River has long been of interest to governments in the region. Among the existing 64 dams, 46 dams have been built in the Lower Mekong Basin (LMB) to produce up to 8650 MW of electricity. Additionally, of the 123 proposed built hydropower dams, eleven hydropower plants have been nominated for the river mainstream and are expected to install a total of 13,000 MW in the LMB countries. However, serious concerns have intensified over the potential negative economic consequences, especially on fisheries and agriculture in Cambodia and Vietnam. To date, most of the concerns have concentrated on the impacts on hydrology, environment, livelihood, and diversity in the LMB attributed to hydropower development. This paper, however, discusses the fishery and agricultural sectors of the LMB and focuses on the downstream floodplains of Cambodia and Vietnam. The dam construction has caused greater losses of biodiversity and fisheries than climate change in the LMB. The reduction of 276,847 and 178,169 t of fish, 3.7% and 2.3% of rice, 21.0% and 10.0% of maize will contribute to a decrease of 3.7% and 0.3% of the GDP of Cambodia and Vietnam, respectively. Lao PDR may benefit the most revenue from electricity generation than the other country in the LMB, as most of the proposed dams are projected in the country. Cambodia burdens 3/4 of the reduction of total capture fishery destruction, whilst Lao PDR, Thailand, and Vietnam endure the remaining 1/3 losses. The tradeoff analyses reveal that losses of capture fisheries, sediment or nutrients, and social mitigation costs are greater than the benefits from electricity generation, improved irrigation, and flood control of the LMB region. The socioeconomic and environmental damage caused by hydropower dams in developing countries, including the Mekong, is greater than the early costs in North America and Europe. It is proposed that dam construction for hydropower in the Mekong River, as well as other rivers in developing countries, should be gradually removed and shifted toward solar, wind, and other renewable resources.

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Section: Impact On Rice Productionmentioning

confidence: 99%

Impacts of Mainstream Hydropower Dams on Fisheries and Agriculture in Lower Mekong Basin

et al. 2020

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“…Considering that countries in Southeast Asia are renowned agro-industrial producers and exporters [64], provisioning services and services from agricultural landscapes (e.g., oil palm) were fairly understudied in the region. Although it is generally expected that highly urbanised areas are less likely to include productive areas, agricultural landscapes can be commonly found within the urban matrix of Southeast Asia [65,66].…”

Section: Specificity Of Research In Southeast Asiamentioning

confidence: 99%

A Review of Urban Ecosystem Services Research in Southeast Asia

Lourdes

Gibbins

Hamel

et al. 2021

Land

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Urban blue-green spaces hold immense potential for supporting the sustainability and liveability of cities through the provision of urban ecosystem services (UES). However, research on UES in the Global South has not been reviewed as systematically as in the Global North. In Southeast Asia, the nature and extent of the biases, imbalances and gaps in UES research are unclear. We address this issue by conducting a systematic review of UES research in Southeast Asia over the last twenty years. Our findings draw attention to the unequal distribution of UES research within the region, and highlight common services, scales and features studied, as well as methods undertaken in UES research. We found that while studies tend to assess regulating and cultural UES at a landscape scale, few studies examined interactions between services by assessing synergies and tradeoffs. Moreover, the bias in research towards megacities in the region may overlook less-developed nations, rural areas, and peri-urban regions and their unique perspectives and preferences towards UES management. We discuss the challenges and considerations for integrating and conducting research on UES in Southeast Asia based on its unique and diverse socio-cultural characteristics. We conclude our review by highlighting aspects of UES research that need more attention in order to support land use planning and decision-making in Southeast Asia.

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“…Long Xuyen Quadrilateral is one of the two major deltas in the Mekong Delta, with a total of 490 000 ha area for agriculture belonging to a part of An Giang, Kien Giang and Can Tho Provinces (Vu et al, 2018;Lee and Dang, 2019c). Yearly, this delta region provides up to 4.9 million tons of rice (Oryza sativa L.), resulting in abundant irrigation water and soil rich in nutrients (Kontgis et al, 2019;Lee and Dang, 2019a).…”

Section: Study Areamentioning

confidence: 99%

“…According to Lee and Dang (2019c), for the three last decades, a significant change in precipitation has been recorded in the Long Xuyen Quadrilateral. Specifically, a slight upward trend in annual precipitation is recorded in the eastern and northern sub-regions, whereas a significant downward trend is found in the western and southern sub-regions, and this may be negatively impacted, leading to drought and flooding in the Long Xuyen Quadrilateral (Lee and Dang, 2019a;Kontgis et al, 2019). For example, in 2016 and 2019, the two extreme drought events in 90 and 93 yr were recorded in the Mekong Delta, resulting in a widespread irrigation water shortage and seriously hampered for rice paddies in the entire Mekong Delta (CGIAR-CCAFS SEA, 2016; Lee and Dang, 2020).…”

Section: Study Areamentioning

confidence: 99%

Shifting crop planting calendar as a climate change adaptation solution for rice cultivation region in the Long Xuyen Quadrilateral of Vietnam

2020

Chil. j. agric. res.

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Rice (Oryza sativa L.) paddies in the Long Xuyen Quadrilateral Region of Vietnam have regularly met the increased risks under the impacts of climate change (ICC), resulting in a decline in crop productivity. The objective of this study was to determine the suitable times for broadcasting rice crops in the rice cultivation paddies belonging to Long Xuyen Quadrilateral as a mitigation solution to the negative ICC. To conduct this research, crop model namely the FAO-AquaCrop (Version 6.0) was selected to simulate grain yields of rice crops based on different scenarios of crop broadcasting calendar (CBC). The results point out that the grain yield of winter-spring (WS) and summer-autumn (SA) cropping seasons can increase up to 6.2% and 5.3% if the CBC is delayed from 7 to 14 d compared to the current broadcasting calendar (baseline) in the two experimental areas while the grain yield of the autumn-winter (AW) cropping season can increase 6.4% if the CBC is shifted 14 d compared to the baseline. In general, a shift in the CBC for all rice broadcasting crops compared to the baseline can be considered as an effective solution to minimize the negative impacts of weather factors as well as contribute to improve rice productivity.

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Climate change impacts on rice productivity in the Mekong River Delta

Cited by 99 publications

References 51 publications

Impacts of Mainstream Hydropower Dams on Fisheries and Agriculture in Lower Mekong Basin

Impacts of Mainstream Hydropower Dams on Fisheries and Agriculture in Lower Mekong Basin

A Review of Urban Ecosystem Services Research in Southeast Asia

Shifting crop planting calendar as a climate change adaptation solution for rice cultivation region in the Long Xuyen Quadrilateral of Vietnam

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