Assessment of Application Conditions of Infiltration Basins for Regulation of Urban Rainwater Drainage

Abstract

Regulation of surface runoff in urban areas with temporary delay by infiltration basins of rainwater in the places of their precipitation and with gradual drainage through the existing reservoirs of small diameters is the most appropriate under the conditions of intensive building development, wear and imperfection of surface drainage systems, especially combined sewerage. Evaluation of application conditions and basic parameters of infiltration basins in surface drainage regulation was carried out on the basis of own experimental studies of infiltration basin fragment with upper typical vegetation layer, numerical computer modeling of surface runoff formation in urban areas, its regulation using infiltration basins and analysis of previous studies. Its water absorption, filtration and clearing indicators were defined on the basis of experimental studies. The self-regenerative restoring function of a vegetative layer, working conditions under the flooded and not flooded conditions were established and defined. According to the amount of suspended solids, BOD, oxidation, pH and dissolved oxygen, the quality of rain runoff when filtering water through the upper vegetation layers of infiltration basins decreases to the normative values.

Soil Textures-Based Evaluation of Horton and Philip's Infiltration Models for Equatorial Small Watersheds

“…The hydrological cycle reveals that 29% of rainfall becomes runoff within the watershed (Tkachuk et al, 2022), with a portion evaporating and the remainder infiltrating the soil. Infiltration occurs when water enters the soil through the surface and passes through four soil layers.…”

“…The Soil Water Infiltration Global (SWIG) database underscores Indonesia's scant 0.47% global contribution, of which 7.7% is from humid tropical climates (Rahmati et al, 2018). Changes in land use often result in diminished infiltration rates, which are crucial for stable watershed flows (Shiraki et al, 2017;Yamamoto et al, 2020) and managing surface water drainage (Tkachuk et al, 2022). Therefore, investigating infiltration rates is imperative (Sayama et al, 2021).…”