Mitigation measures of storm surge inundation at an onshore aquaculture farm

Journal of Hydrology, Год журнала: 2024, Номер 638, С. 131443 - 131443

Опубликована: Июнь 15, 2024

Язык: Английский

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A process-based impact of tropical cyclone and hurricane on surface water-groundwater interaction and contaminant mobilization of coastal aquifers

Progress in Disaster Science, Год журнала: 2024, Номер 22, С. 100318 - 100318

Опубликована: Фев. 29, 2024

Coastal aquifers are hydraulically connected to the sea and a storm (cyclone/hurricane) can disrupt surface water-groundwater (SW-GW) interaction process which is largely unexplored. Thus, this study aims explore impact of surges (both positive negative) on coastal aquifers, focusing pollutant mobilization, groundwater level (GWL) fluctuations, solute concentration (Salinity, Cl) subsequent re-stabilization based pre-existing studies from coast USA India through systematic review process. The outcome revealed that there relationship between cyclonic speed, rainfall, surge height GWL in lithologically conductive aquifers. Positive raises GWL, salinity transportation contaminants into while negative induces fall salinity, accelerates submarine discharge exports contaminants/nutrients sea. restabilization SW-GW dynamics case dependent, takes week month years, dependent local hydrogeology intensity storm. So, recommends prioritizing safeguard otherwise increasing storms will lead questions freshwater sustainability ecosystems present climate change scenario.

Язык: Английский

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Simulation of the impact of sea level rise groundwater flooding along the south-eastern coast of India

Urban Climate, Год журнала: 2023, Номер 52, С. 101732 - 101732

Опубликована: Ноя. 1, 2023

Язык: Английский

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SEA LEVEL RISE DRIVEN GROUNDWATER INUNDATION: EFFECTS OF ISLAND HYDROGEOLOGY ON FRESHWATER LENS DYNAMICS

Опубликована: Янв. 1, 2024

Groundwater inundation due to sea level rise poses a threat fresh groundwater availability in coastal areas, and small islands are particularly vulnerable. On an island, when rises, the freshwater lens also rises difference density between salt groundwater. As water table above land surface it forms lake is exposed additional evaporative losses, reducing amount of available. This work aims improve our understanding impact different hydrogeologic settings phenomena on salinity lens. We showcase using Lake Transport package, modeling tool for MODFLOW 6, model more physically accurate computationally efficient way compared past methods. used these methods investigate common setting where upper low hydraulic conductivity layer underlain by high order understand layered system homogeneous one. Ultimately, initial condition, regardless other factors, was most significant determining explored particular phenomenon called driven instability or fingering events (DF events), higher fluid overlies intrudes into less below it. can occur formed underlying aquifer. The onset DF event impacts function five factors: changes recharge, upconing, evapoconcentration, upward movement from SLR, connection/isolation

Язык: Английский

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Assessing the Effects of Flood Risk on Fish Farming in the Coastal Region of Delta State, Nigeria

International Journal of Oceanography & Aquaculture, Год журнала: 2024, Номер 8(1), С. 1 - 15

Опубликована: Янв. 1, 2024

This study explores the consequence of flood risk on fish agribusiness. Data from 116 respondents were analyzed using various tools such as descriptive statistics, means Likert scale, cost and return analysis, regression model. The findings indicate that had an average age 39 years, with most being educated having around 7 years fishing experience. majority married males household size 6 persons. Flood events occurred approximately four times average, leading to significant disparities in farming. severity index was 0.82%, many expressing willingness discontinue during floods. Most farmers lacked insurance coverage government incentives, limited access credit. Factors contributing included mortality, access, income fluctuations, decreased farm output. On 1345 lost incidents, 58.6% facing high-risk levels. Coping strategies pre-flood measures like embankment raising post-flood actions seeking assistance applying lime affected farms. recommends joining cooperative societies improve funds resources offers insights for mitigating risks aquaculture business Delta State

Язык: Английский

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Exploring the effects of reducing groundwater pumping on downward saltwater intrusion into deep aquifers in coastal Tianjin, China

Sustainable Horizons, Год журнала: 2024, Номер 12, С. 100110 - 100110

Опубликована: Май 24, 2024

In this study, a 3D variable-density groundwater flow and salt transport model was developed calibrated to simulate spatial temporal variation of salinity in Binhai New Area located at coastal Tianjin Municipality for tracking saltwater/freshwater interface depth, analyzing saltwater descending velocity, determining downward intrusion ceasing time under the background rigorous pumping regulations (groundwater rate reducing zero 2023). Results indicated that: (1) depths northern area would increase from 130–170 m 150–190 2016 2031, central 180–230 210–260 2030, southern 280–300 300–320 2030 then stay unchanged, respectively; (2) velocities northern, central, decrease linearly will reach years (3) enlargement extent cease since 2031 or area. To best knowledge authors, research is first effort unravel fact vertical (saltwater descending) occurred Tianjin, which demonstrates an urgent need exploitation.

Язык: Английский

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Assessing the informativeness of a coupled surface–subsurface watershed model for understanding debris flow: a hydrological perspective

Hydrological Sciences Journal, Год журнала: 2024, Номер 69(9), С. 1172 - 1185

Опубликована: Май 30, 2024

Characterization of debris flow is critical to both risk assessment and hazard mitigation. Recent technologies enable on-site environmental monitoring sensors for geological disaster monitoring. However, the spatio-temporal understanding in remote mountainous areas still limited due difficulties observation networks its complex driving conditions. Here we apply a coupled surface-subsurface hydrologic model examine characteristics water movements near sites Southwest China. Our approach captured temporal dynamics infiltration, redistribution soil moisture, groundwater storage, lateral fluxes. The flux storage were informative indicators identifying location. Such informativeness was only effective when hourly analyzed. findings provide new insight into quantifying susceptibility. This study suggests that watershed modeling can be preliminary monitoring, planning management problems flow.

Язык: Английский

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Evaluating the effects of topography and land use change on hydrological signatures: a comparative study of two adjacent watersheds

Опубликована: Июнь 17, 2024

Abstract. Watershed hydrological processes are significantly influenced by land use/land cover change (LULCC) and watershed characteristics such as topography. This study comparatively investigates the impacts of terrain slope urbanization-driven LULCC on in two adjacent subtropical watersheds but with distinct land-cover conditions within Greater Bay Area (GBA) China. We developed an Integrated Surface-Subsurface Hydrological Model (ISSHM) using Simulator for Hydrologic Unstructured Domains (SHUD), which was calibrated data from river groundwater flow monitoring stations watersheds. The model facilitated simulations to assess how affect surface runoff, subsurface flow, evapotranspiration (ET), infiltration. Our results indicate that differently varying characteristics. In mountainous areas, there consistent high correlations between annual infiltration, across all However, at lower elevations, responses steeper correlate weakly local slope. Furthermore, urbanization (increase impervious areas) has led significant increases runoff decreases infiltration ET watersheds, especially those slopes. On other hand, gentler slopes, increase is less than percentage area, suggesting a buffering capacity these flatter against urbanization. this diminishing increasing rainfall intensity.

Язык: Английский

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Numerical modelling of pore water pressure response beneath a raft foundation during real river floods

Journal of Hydrology, Год журнала: 2024, Номер 638, С. 131557 - 131557

Опубликована: Июль 1, 2024

Tall buildings with basement levels are increasingly being built due to need for space in large cities. Frequently, such structures involving a raft foundation and diaphragm walls below the water table. In addition, sometimes located on floodplains. Therefore, if river flood event occurs, building can be exposed pore pressure (due fluctuation of table) acting beneath its foundation. The generated subpressures will depend table changes time, way pressures transmitted through ground. Previous works have studied this behavior laboratory small-scale tests or numerically; however, many them used constant hydraulic gradient fluctuations time been ignored. work, evolution mobilized floodplain is studied. To do that, full-scale numerical models capable simulate flooding corresponding overflow developed. Such incorporate data from change–time curves recorded during real floods associated set regimes. Additionally, effect factors as soil permeability, wall length, thicknesses also analyzed. Results suggest developed herein reproducing induced flooding. Furthermore, it was found that above-mentioned could impact percentage respect maximum flooding, principal risk arises near catchments where flow increases over an extended period. Finally, practical implications recommendations practitioners provided.

Язык: Английский

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Comment on hess-2024-136

Опубликована: Июль 28, 2024

Abstract. Watershed hydrological processes are significantly influenced by land use/land cover change (LULCC) and watershed characteristics such as topography. This study comparatively investigates the impacts of terrain slope urbanization-driven LULCC on in two adjacent subtropical watersheds but with distinct land-cover conditions within Greater Bay Area (GBA) China. We developed an Integrated Surface-Subsurface Hydrological Model (ISSHM) using Simulator for Hydrologic Unstructured Domains (SHUD), which was calibrated data from river groundwater flow monitoring stations watersheds. The model facilitated simulations to assess how affect surface runoff, subsurface flow, evapotranspiration (ET), infiltration. Our results indicate that differently varying characteristics. In mountainous areas, there consistent high correlations between annual infiltration, across all However, at lower elevations, responses steeper correlate weakly local slope. Furthermore, urbanization (increase impervious areas) has led significant increases runoff decreases infiltration ET watersheds, especially those slopes. On other hand, gentler slopes, increase is less than percentage area, suggesting a buffering capacity these flatter against urbanization. this diminishing increasing rainfall intensity.

Язык: Английский

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