Analysis of Water Cycle Effect according to Application of LID Techniques

Abstract

At present, the development in rainwater management approach is still insufficient due to the numerous adverse effects of urbanization. Storm water management is being developed to restore the natural state of water cycle undergoing several processes which were hindered such as infiltration and evapotranspiration. Low Impact Development (LID) was established in order to reduce the negative effects of urbanization to our environment. These developments can be used to respond to the effects of climate change such as heat island phenomenon. The effects of the development of new town in the district plan with application of LID facilities were studied and reported. Typically, LID facilities were applied in small scale development and were rarely used in large-scale development. Most of studies, however, did not assessment the effects of large-scale development projects with LID application to the natural water cycle. This study was conducted to simulate the urban hydrologic cycle simulation on Asan-Tangjeong in Korea. This study may be used in urban hydrologic cycle simulation and establishment of an urban water management plan in the future. Lastly, this study generated a model using the recently updated SWMM5 which determined the hydrologic cycle simulation after installation of LID facilities.

Evaluation of SWMM-LID Modeling Applicability Considering Regional Characteristics for Optimal Management of Non-Point Pollutant Sources

“…A comparison of the SC2-4 scenarios applied to urban and complex areas based on the land-use characteristics of the areas showed that the outflowreduction efficiency was higher when the outflow reduction strategies were installed in locations with large areas of impermeable land. Previous studies have suggested that the application of LID in distributed to urban areas with a high impermeable area rate can efficiently improve peak flow and pollution load [41,[43][44][45]. Therefore, if this method of an area with a high urban density and a large impermeable area is prioritized when selecting the LID location in the watershed, it is expected that the effect of reducing the amount of runoff and pollution load will be high.…”

The Impact of Non-Point Source (NPS) Management on Non-Point Source Reduction and Water Cycle Improvement in an Urban Area

“…For the management period of the last ten years (2010 to 2020), it is possible to evaluate the management measures and effects of the project for non-point source reduction and water cycle improvement. Effect analysis techniques include calculation through numerical modeling, spatial information analysis, and the convergence of remote sensing data and artificial intelligence technology [17][18][19][20][21]. The use of numerical models, such as watershed models, makes it possible to quantitatively simulate discharge and water quality changes before and after LID and GI application [22][23][24].…”

“…The water cycle improvement effect can be evaluated through the analysis of spatial information, such as cadastral maps and land use maps. Recently, studies have been conducted to comprehensively analyze the changes in green areas extracted from satellite images and the effects of the LID project on discharge and water quality [17][18][19][20][21]. With the development of science and technology as well as the expansion of data productivity, studies on the analysis of impervious areas have been conducted using satellite images, such as Landsat [25,26] and Sentinel [27,28], and machine learning.…”

Evaluation and Improvement Measures of the Runoff Coefficient of Urban Parks for Sustainable Water Balance

“…Modifications to plans in urban development are due to environmental and economic changes and overpopulation, and various problems arise regarding the natural environment and urban landscape [1,3,4]. Advancement and indiscreet exploitation due to urban development negatively influence environmental and ecological sectors [5][6][7][8] and fail to meet citizens' needs for green space and natural environments [9][10][11].…”