Influence of flooding on groundwater flow in central Cambodia

May, Raksmey; Jinno, Kenji; Tsutsumi, Atsushi

doi:10.1007/s12665-010-0679-z

Cited by 13 publications

(12 citation statements)

References 9 publications

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“…() and May et al . () found that flooding around the Mekong mainstem in Cambodia (Southeast from our study area) plays an important role in recharging groundwater. The findings of Burnett et al .…”

Section: Analytical Frameworkmentioning

confidence: 99%

“…It is important to note that our model does not include the interaction of groundwater and floodplain due to the absence of detail data of these processes from the floodplain. There exist various groundwater studies in Cambodia, as well summarized by Landon (2011), but these are mostly located outside the floodplains with only few exceptions (Kazama et al, 2007;May et al, 2011;Burnett et al, 2012). Moreover, our hydrodynamic model applied to the lake does not have a groundwater component that could be coupled with the flood modelling, and thus enable simulation of floodgroundwater interconnections.…”

Section: Analytical Frameworkmentioning

confidence: 99%

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Water balance analysis for the Tonle Sap Lake–floodplain system

Kummu

Sopharith

Yin

et al. 2013

Hydrological Processes

194

121

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Abstract:The Tonle Sap Lake of Cambodia is the largest freshwater body of Southeast Asia, forming an important part of the Mekong River system. The lake has an extremely productive ecosystem and operates as a natural floodwater reservoir for the lower Mekong Basin, offering flood protection and assuring the dry season flow to the Mekong Delta. In light of the accelerating pace of water resources development within the Mekong Basin and the anticipation of potentially significant hydrological impacts, it is critical to understand the overall hydrologic regime of Tonle Sap Lake. We present here a detailed water balance model based on observed data of discharges from the lake's tributaries, discharge between Mekong and the lake through the Tonle Sap River, precipitation, and evaporation. The overland flow between the Mekong and lake was modelled with the EIA 3D hydrodynamic model. We found that majority (53.5%) of the water originates from the Mekong mainstream, but the lake's tributaries also play an important role contributing 34% of the annual flow, while 12.5% is derived from precipitation. The water level in the lake is mainly controlled by the water level in the Mekong mainstream. The Tonle Sap system is hence very vulnerable, from a water quantity point of view, to possible changes in the Mekong mainstream and thus, development activities in the whole Mekong basin. From a biogeochemical point of view, the possible changes in the lake's own catchment are equally important, together with the changes in the whole Mekong Basin. Based on our findings, we recommend of continuing the monitoring programmes in lake's tributaries and urgently starting of groundwater measurement campaign within the floodplain, and including the groundwater modelling to be part of the hydrodynamic models applied for the lake.

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Section: Analytical Frameworkmentioning

confidence: 99%

Section: Analytical Frameworkmentioning

confidence: 99%

Water balance analysis for the Tonle Sap Lake–floodplain system

Kummu

Sopharith

Yin

et al. 2013

Hydrological Processes

194

121

View full text Add to dashboard Cite

show abstract

“…For storm floods, most studies focused on flood disasters and forecast [13,14], flood risk and efficiency [15,16], and floodwater utilization [17,18], which has been extended such that rain-flood can be one of the main recharge sources for groundwater in some regions [19,20]. Despite the disaster of floods, under positive circumstances, flood water can be used to constitute a considerable amount of a region's water resources [21], especially in a groundwater system.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Shallow Groundwater Recharge from Extreme Rainfalls in the Sanjiang Plain, Northeast China

Liu

Jiang

Zhang

et al. 2016

Water

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Groundwater recharge from rainstorms can be vital for regional water resources. With the expansion of the need for more water in some specific regions under global climate change, groundwater is being pumped at a far greater rate than it can be naturally replenished. Considering that excess rainstorms could be utilized for groundwater recharge to lessen the declining tendency of regional groundwater level in the Sanjiang Plain, Northeast China, we analyzed groundwater changes in the quantity of a regional shallow aquifer in the region following extreme rainfall in 2013. The results show that shallow groundwater table in the north and central Sanjiang Plain increased following the 2013 extreme rainfall. Most of the annual maximal change of groundwater depth (MCGD) was in the range of 1 m to 3 m, occupying 72.1% of the study area. The average MCGD was 1.73 m in 2013, about 0.4 m higher than the mean value during the last five years (1.33 m). Spatially, the overall average groundwater depth showed an increasing trend from the southeast to the midwest and northeast. We estimated a total recharge of approximately 41.14 × 10 8 m 3 from the 2013 extreme rainfall across the north and central Sanjiang Plain. This large quantity of recharge demonstrates the important role that large rainstorms can play in regional shallow groundwater resources.

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“…However, floods' impact on regional shallow groundwater and quality is not well documented. Although floods are often hazardous to human life and the environment (e.g., soil erosion, inundation of lands, and swamping caused by the groundwater level rising) [1][2][3][4], they can be one of the main recharge sources for groundwater in some regions, especially for shallow groundwater [5,6]. This aspect has not been addressed sufficiently in the research, probably due to the difficulty of quantifying flood impacts because of the characteristics of rapid occurrence, short-term duration of floods, and limitation in modeling the interchange processes and measuring the interchange processes [4].…”

Section: Introductionmentioning

confidence: 99%

Impacts of the 2013 Extreme Flood in Northeast China on Regional Groundwater Depth and Quality

Wang

Zhang

2015

Water

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Abstract:Flooding's impact on shallow groundwater is not well investigated. In this study, we analyzed changes in the depth and quality of a regional shallow aquifer in the 10.9 × 10 4 km 2 Sanjiang Plain, Northeast China, following a large flood in the summer of 2013. Pre-(2008Pre-( -2012 and post-flood records on groundwater table depth and groundwater chemistry were gathered from 20 wells across the region. Spatial variability of groundwater recharge after the flood was assessed and the changes in groundwater quality in the post-flood period were determined. The study found a considerable increase in the groundwater table after the 2013 summer flood across the region, with the largest (3.20 m) and fastest (0.80 m·s 4576 study shows that floods should be managed as water resources to ease the local water shortage as well as shallow groundwater pollution.

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Influence of flooding on groundwater flow in central Cambodia

Cited by 13 publications

References 9 publications

Water balance analysis for the Tonle Sap Lake–floodplain system

Water balance analysis for the Tonle Sap Lake–floodplain system

Assessment of Shallow Groundwater Recharge from Extreme Rainfalls in the Sanjiang Plain, Northeast China

Impacts of the 2013 Extreme Flood in Northeast China on Regional Groundwater Depth and Quality

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