Portal de Periódicos da CAPES

Effect of Groundwater Filtering on Clogging of Recharge Well

2024; Springer Nature; Linguagem: Inglês

10.1007/978-981-99-9215-7_32

2366-2557

Hidehiko Hayashi, Akira Ishikawa, Nobuaki Kohsaka,

Urban Stormwater Management Solutions

At the construction site for a rainwater storage facility in Niiza City, Saitama Prefecture, the plan includes recharge groundwater into wells outside the excavation area in order to prevent subsidence in the surrounding residential areas. This paper reports on the application of a pumped filtration system for groundwater that is to be injected into recharge wells as a method to reduce clogging. Five recharge wells were constructed, three of which were recharged with filtered groundwater and two with untreated groundwater. After continuously injecting groundwater at a constant rate for about six months, the injection efficiency of the three wells recharged with treated water remained almost unchanged. On the other hand, the two wells recharged with untreated water were more severely clogged, with efficiency dropping by about 10% or less of the initial level. During the construction work, the groundwater level in an observation well outside the excavation area remained unchanged and no land subsidence was observed.