Urban Water Circulation

Water Circulation System

Water cycle concept


What is Low Impact Development (LID)?

As a water management technique to maintain the ecological and biological characteristics of watersheds and restore rainwater circulation,
it is an industry that is attracting global attention in terms of reducing ecosystem disturbance and enabling soundness of water and heat circulation through rainwater infiltration and evaporation.

Advantages of applying LID

  • Flood protection and biodiversity provision
  • Purification of pollutants contained in rainfall runoff
  • Conservation and restoration of vegetation such as trees
  • Promote a healthy water circulation system
  • Reduce water management and acquisition costs
  • Energy cost reduction due to reduction of urban heat island effect
  • Reduce landscaping maintenance costs
  • Improving city image and scenery
  • The cost of sewage treatment facilities
  • Increase the property value of the site
  • Improving the appearance and aesthetic value of the community
  • Build a city that is more cost-effective
  • city image enhancement

How to build an efficient LID system


Water cycle system concept

  • Analysis and characterization of watersheds
  • Analysis of water system and catchment patterns (collection areas)
  • Analysis of land cover, conservation and use characteristics

Planning and design for each catchment area (SWMM design)

  • Setting goals for urban regeneration
  • Setting goals for improving the water circulation system

Effect prediction according to LID application

  • Designing a water circulation system for the entire site
  • Concept setting for each catchment area
  • Planning and design by catchment area
  • Effect prediction according to LID application
  • Effect analysis/test based on monitoring

Efficient management of rainwater

  • Prior to development

  • Now (increased impermeability)

  • Future (Introduction of LID technique)

Establish a sound water circulation system by effectively managing rainwater

1. Tree box filter A facility that reduces pollutants contained in rainfall runoff by reclaiming boxes planted with trees or shrubs and adsorbing oil and phosphorus in the front-end filtration tank and absorbing nutrients and heavy metals by moist soil in the planting part.
2. Plant cultivation bed A facility that uses spaces such as urban green spaces or flower beds to infiltrate and store rainwater during rainfall, and to reduce non-point pollutants on roads through filtering tanks and moistening work.
3. Unmanaged rooftop greening A new, no-management roof greening system with increased insulation and soundproofing effects due to zero soil, inducing natural death of weeds by creating a simple and ultra-thin planting base on the roof.
4. Rain Garden A technological element that effectively manages rainwater and improves the urban landscape by trapping rainwater as much as possible in the ground, collecting and storing rainwater runoff and allowing it to permeate
5. Infiltration Ditch & Vegetation Waterway In the form of an open shallow trench, it is classified into infiltration trenches and vegetative waterways depending on the presence of vegetation.
6. Modular penetrant Technological factor for cultivating groundwater and reducing rainfall runoff through underground penetration of rainwater by embedding a modular infiltration tank around trees or shrubs
7. Penetrating packaging A technical element of the function of reducing rainwater into the soil by penetrating rainwater through the porous sand (porous sand)
8. Sand filtration A technical element to improve water quality by removing contaminants and suspended substances in the runoff through sand filtration (porous sand) of rain runoff from impervious surfaces

LID promotional video