Tanachaichoksirikun, Pinit
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Tanachaichoksirikun, Pinit
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pinit.ta@kmitl.ac.th
17 results
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Item type:Publication, FLOOD AND DROUGHT PRELIMINARY ASSESSMENT IN THE BANG PAKONG RIVER BASIN USING THE WEIGHED FACTOR INDEX METHOD(2025-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Modelling Water Distribution Strategies for a Data-Limited Small Island Using EPANET: Technical and Policy Insights from Si Chang Island, Thailand(2026-05-01)Small islands often face chronic water shortages due to limited storage capacity, seasonal variability, and growing demand from tourism and urbanization. Si Chang Island, Thailand, experiences severe dry-season water scarcity, requiring improved water supply planning. This study applies the EPANET hydraulic modelling tool to design and evaluate water distribution networks under two scenarios: (1) a surface water supply system from the Si Chang Reservoir, and (2) a groundwater-based system near the island’s football field. Using Darcy–Weisbach head loss calculations and demand estimates, we assessed flow velocity, pressure, and construction costs. Both systems met design criteria, but the reservoir-based option achieved better cost efficiency (2.81%) and reliable pressure (minimum 15.05 m) with an average velocity of 1.20 m/s. The system can supply approximately 130% of the estimated demand, corresponding to a surplus capacity of about 30%. The findings demonstrate how hydraulic modelling can guide infrastructure planning for small, data-limited islands. Integrating technical design with policy considerations enhances the reliability, cost-effectiveness, and resilience of water supply systems. The approach presented herein offers a practical framework for decision-makers addressing water scarcity challenges on small islands worldwide. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Integrated Shoreline Dynamics Assessment Using QSCAT and Random Forest Along the Phetchaburi Coastline, Thailand(2026-01-01); ; Silarom, KornvisithThe Phetchaburi coastline faces significant erosion risks, exacerbated by human activities and climate change. This research evaluates shoreline shifts and mangrove cover modifications along the 88.5 km coastline, utilizing the QGIS Shoreline Change Assessment Tool (QSCAT) plugin and Random Forest (RF) classification on Landsat 8-9 OLI/TIRS images from 2017 to 2023. The integration of these methods provides a robust framework for monitoring coastal changes in a data-scarce, microtidal environment. Results indicate a highly dynamic coastline with a maximum erosion distance of -108.71 m and a maximum accretion of +122.95 m. Statistical analysis of 1,766 transects reveals a critical erosion trend, with a maximum erosion rate reaching -38.66 m/year. Overall, 50.74% of the transects experienced erosion, while 48.98% showed accretion. The RF model demonstrated high effectiveness in land use classification, achieving an overall accuracy of 96.50% and a Kappa coefficient of 0.92. Spatiotemporal analysis reveals a strong link between mangrove degradation and increased erosion zones, emphasizing the protective function of vegetation. These findings provide essential quantitative benchmarks for developing targeted coastal management and restoration strategies in the Gulf of Thailand. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, GROUNDWATER VULNERABILITY OF THAILAND’S LOWER CHAO PHRAYA BASIN(2020-01-01); Since global warming effects water resources, especially, surface water sources, groundwater is an essential water source, when facing the critical drought. Groundwater is less sensitive than surface water because groundwater response is delayed. However, groundwater may face critical drought and shortage. Groundwater vulnerability is a tool to identify critical areas for maintaining water quantity and quality. The Fuzzy-Catastrophe-based DRASTIC model, drought persistence and several climate scenarios were combined to estimate the vulnerability on the confined aquifers of Thailand’s Lower Chao Phraya (LCP) basin. Thus, critical areas that may face groundwater shortage were identified. Our analysis predicted that most of the basin would have few effects on climate change. However, vulnerability maps showed that 5% of the basin may be critical areas that may show groundwater shortage, especially, drought persistent areas with low rainfall. Generated maps identify ‘hotspots’ and can help decisions on groundwater development and economic growth and aid planning policy. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, ALTERNATIVE APPROACH TO GROUNDWATER MODELING IN DATA-DEFICIENT REGIONS(2025-01-01); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Climate Change on Groundwater Age of Thailand's Lower Chao Phraya Basin(2019-10-25); Water is indispensable for life, including, groundwater that the largest fresh water source. Groundwater sustainability is threatened by many factors, one is climate change which lead to flood and drought. Groundwater age is an indicator that can be applied for vulnerability assessment and sustainable groundwater management. This research focus on the changing of groundwater age under the effect of climate change using the steady-state three-dimensional mathematical simulation including, MODFLOW-2000 and MODPATH. In addition, the climate scenario including, IPSL-CM5A-MR that consist the increasing of carbon dioxide (Representative Concentration Pathways; RCP) between 2.6, 4.5 and 8.5 in the period 2017-2036. The results revealed groundwater age was highly distributed between 140 to 177,505 years with the average 18,665 years due to the distribution of groundwater recharge and pumping in the basin. In addition, the average groundwater age with RCP 2.6, 4.5 and 8.5 were decreased to 17,217, 15,960, 16,286 years from base case (18,665 years), respectively. Because the quantity of rainfall which contribute the hydraulic head, hydraulic gradient and velocity was changed. In conclusion, the groundwater sustainability in the Lower Chao Phraya basin was consistent during this period because the groundwater age was decreased by rainfall. However, the old groundwater, non-renewable groundwater could be conservative due to the distribution of groundwater age was increased. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, RECHARGE ESTIMATION AND SITE IDENTIFICATION FOR MANAGED AQUIFER RECHARGE IN SUPHANBURI, THAILAND USING GIS AND MODFLOW(2026-01-01); ; This study focuses on groundwater recharge estimation and site identification for Managed Aquifer Recharge (MAR) in Suphanburi, Thailand, an agriculturally intensive region increasingly affected by floods and droughts. An integrated approach combining Geographic Information Systems (GIS), water balance analysis, and groundwater simulation using Visual MODFLOW was applied to assess recharge potential. Key factors, including land use, slope, and hydrogeology, were analyzed to delineate 5 suitable recharge zones. Field data from 13 observation wells collected between 2014 and 2024 were used to calibrate and validate the groundwater model. The model has high accuracy with R<sup>2</sup> values of 0.983 (Calibration) and 0.992 (Validation), and normalized RMSEs of 5.97% and 5.20%, respectively. The result showed that the highest recharge rates were 343.42 and 320.39 m<sup>3</sup>/day, observed in urban and industrial zones near the Tha Chin River, with capacities sufficient to support over 1,600 people. This research provides a practical and replicable framework for MAR site selection and implementation, supporting data-driven water management strategies in flood and drought-prone regions. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Improving Groundwater Model in Regional Sedimentary Basin Using Hydraulic Gradients(2020-05-01); ; Fogg, Graham E.Groundwater flow systems are strongly influenced by heterogeneity and anisotropy of hydraulic conductivity (K). Particularly in stratified clastic sedimentary aquifers, the vertical hydraulic gradient (dh/dz) is often very high, due to the low vertical hydraulic conductivity (K<inf>v</inf>) or high anisotropy (K<inf>h</inf>/K<inf>v</inf>). However, data on the vertical hydraulic gradient to calibrate the anisotropy is seldom available. We investigated the relationship between the variable K<inf>h</inf>/K<inf>v</inf> and the dh/dz computed by a groundwater flow model to improve the regional parameterization using an extensive data base on 3D distribution of hydraulic head. Although it is commonly assumed that the value of K<inf>h</inf>/K<inf>v</inf> is 10, our values typically ranged between 10 and 10<sup>5</sup>, because the maximum K<inf>h</inf>/K<inf>v</inf> was 10<sup>5</sup> in this regional basin. The simulations used MODFLOW-2000. We found that the high K<inf>h</inf>/K<inf>v</inf> contributed to high dh/dz, while identifying locations of potentially good vertical connectivity between the aquifer zones, where dh/dz is very low and difficult to measure sufficiently accurately. Sensitivity analysis of dh/dz to recharge and pumping from wells showed that recharge led to change in inflow of groundwater that led to head change, which in turn led to change in dh/dz. While, pumping contributed to aquifer outflow, as change in head drawdown around the influence zone, in turn changed dh/dz. Additionally, dh/dz in a shallower aquifer was more strongly affected by recharge and pumping. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Impact of climate change on the groundwater sustainability in the lower Chao Phraya basin, Thailand(2018-08-14); ; Saraphirom, PhayomThis research investigates the impact of climate change on the hydraulic heads of Thailand's Lower Chao Phraya basin. The research also determines the sustainability of groundwater as the result from climate change. In the study, the climatic scenario (IPSL-CM5A-MR) of the Representative Concentration Pathways (RCP) between 2.6, 4.5 and 8.5 were considered, and the simulations were carried out using the three-dimensional groundwater flow model (i.e. MODFLOW-2000) predicting the groundwater behavior between 2017 and 2036. The findings revealed that the impact of climate change on the hydraulic head fluctuation was positively correlated. Specifically, under the IPSL-CM5A-MR RCP 4.5 that has the highest average precipitation, the average hydraulic head increased. In conclusion, the sustainability of groundwater in the Lower Chao Phraya basin was sufficient during the simulated time. However, the groundwater budget was lower than the average groundwater budget during 2009 - 2014 indicating, the groundwater storage was continuously decreased. Specifically, the 2nd, and 3rd (Phra Pradeang and Nakorn Luang) aquifers may be facing the groundwater shortage in the future. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, EXPECTED GROUNDWATER DEVELOPMENT AND WATER SECURITY IN DEFICIT SMALL TOURISM ISLAND(2026-01-01); ;