Impervious Surfaces: Review of Recent Literature(Georgia Coastal Research Council)

Impervious Surfaces: Review of Recent Literature,
Christine Tilburg and Merryl Alber,
Georgia Coastal Research Council


※ memo:

• ... Urban growth, both inland and at the coastal zone, puts many stresses on the physical, chemical, and biological resources of the environment. One of the most obvious results of development is the introduction of impervious surface.
• Impervious surface consists of manmade coverings of the natural landscape where water cannot soak through, and includes any hard surface like roof tops, asphalt, or concrete. Any increase in impervious surface has a direct effect on water storage and movement in the system. Figure 1 details the changes in the hydrologic system that occur as the amount of impervious surface increases. In an undeveloped or forested system, runoff composes only 10% of the hydrologic flow with the rest of the water either lost to evaporation or infiltrating into the ground. However, as the amount of impervious surface increases to 35-50%, runoff increases to 30% and far less water is stored via infiltration{물의 지하 침투}. ...