Evaluate the Use of Wetland Performance Includes Multi-Scale Tests to Emphasize the Runoff Control Volume Based on Climate Change Adaptation Strategy

Evaluate the Use of Wetland Performance Includes Multi-Scale Tests to Emphasize the Runoff Control Volume Based on Climate Change Adaptation Strategy

Yasir Abduljaleel^{a, *}

^a Department of Civil and Environmental Engineering Washington State University

^* Corresponding Author: Yasir.abduljaleel@wsu.edu, h3h111@gmail.com

 

Abstract

Climate change has affected environmental and weather hazards, such as flooding, stormwater, and droughts. Extreme storms have wide and heavy impacts on lives and property. Nowadays, according to the urbanization phenomena, there are different changes over the surfaces. Indeed, the surfaces are mainly covered by impermeable materials, such as creating buildings, concrete, asphalt, etc., so these elements can intensify the water movements. In this regard, researchers have concentrated on evaluating LID (Low Impact Development) hydrological performance and hydraulic behavior on flooding in the last years. Therefore, assessing the performances of the wetland under climate change conditions can proved to be a robust solution to emphasize the runoff control volume based on the climate change adaptation strategy. In this study, we assessed the performance of wetlands by simulating the runoff module with the original scenario considering no wetlands implementation to calculate the original runoff volume. Subsequently, the drainage model will be simulated in scenarios with wetlands controls to get the adapted runoff volume and achieving the desired runoff mitigation and reduction through applying the Stormwater Management Model (SWMM) to an urban watershed. The study area is located at the Boeing Commercial Airplane, which is on the southern shore of Lake Washington, within the City of Renton, Washington. Downstream analysis was conducted considering the natural point-of-discharge is a wetland that eventually drains to Springbrook Creek located about ¼ mile from the southeast corner of the study area. The Cedar River's facility is bordered to the west, and Logan Avenue to the east, and surrounding land use is predominantly commercial, industrial, and retail. The observed runoff data (1995–2014) from the situ gauging station were used for calibration and validation. The calibration period for long time-series is from 1995 to 2008, and the validation period is 2009–2014. The result shows that the NSE coefficients of the parameter sets with the best simulation of the Watershed dynamics calibration and validation periods are 0.73 and 0.71. Also, we concluded that the wetland provides better amounts of peak flow reduction. The selection of SWMM parameters for calibration can be evaluated the sensitivity of SWMM calibration parameters, and the result revealed that the parameters conduit CN, percent zero, imperviousness, and sub-catchment width have relatively significant effect.

 Keywords: Keywords: Wetlands, Hydrology, Climate change, SWMM; Hydrological Model; Calibration model, Sensitivity Analysis.