Underground Tank Modelling for Runoff Reduction and Groundwater Recharge

EasyChair Preprint 15006

Abstract

High urban population growth causes cities to expand and impacts the global environment such as land use, water scarcity, increased runoff and the frequency and extent of flood areas. Increased inundation is also due to climate change or hydrological and hydrometeorological variations caused by environmental changes and accelerated human activities. Increased demand for clean water results in dependence on groundwater utilization to meet the clean water needsneeds in urban areas, feared to have an impact on land subsidence, seawater intrusion, decreased groundwater quality and vulnerability of groundwater services. Eco-friendly and sustainable runoff control and groundwater recharge can be done with the construction of underground water tanks, such as detention tanks, retention tanks to reduce flood peaks, store or harvest rainwater for utilization, infiltrated into the ground for groundwater recharge and the excess flowed into the city drainage network. This study aims to analyze the effect of underground tank to reduce surface flow and recharge groundwater through infiltration, analyze the relationship model between influential parameters and simulate the application of subsurface tank design results in reducing surface flow and groundwater recharge. The research was conducted experimentally in the laboratory using a flume (Length =240 cm; Width = 35 cm; Depth =110 cm), which consists of a detention tank, retention tank and circulation tank equipped with measuring instruments. The research parameters include discharge, rainfall, conveyance coefficient, catchment area, soil permeability, infiltration rate, water table elevation and tank capacity. The research simulation includes 4 variations of discharge, 3 variations of soil permeability and 3 variations of groundwater level. The expected results are the effect of underground tank to reduce runoff and groundwater recharge and the relationship model between influential parameters.

Keyphrases: Groundwater, Runoff, Underground Tank

@booklet{EasyChair:15006,
  author    = {Hasdaryatmin Djufri and Rita Tahir Lopa and Farouk Maricar and Riswal Karamma},
  title     = {Underground Tank Modelling for Runoff Reduction and Groundwater Recharge},
  howpublished = {EasyChair Preprint 15006},
  year      = {EasyChair, 2024}}