Swat Research Papers
Indeed, Simly Dam has a crucial role because it is the source of freshwater of Islamabad, the Federal Capital of Pakistan. Simly Dam is located 13.0 km upstream of Chirah on Soan River. Demissie, Hydrologic modeling of the iroquois river watershed using HSPF and SWAT, J. In this study, the GIS based watershed model, Soil and Water Assessment Tool (SWAT) was applied. The Simly reservoir is recognized as an essential constituent of the bulk water supply scheme for Islamabad, Fig. Water released from the reservoir to Islamabad is the cheapest source of fresh drinking water for the city. The average volume inflow from Simly Dam is estimated at 190.3 mm3/year, from 1990 to 2001 according to a gauged point on the Dam location. Description of SWAT model SWAT is a river basin or watershed, scale model. Yapo, Status of automatic calibration for hydrologic models: comparison with multilevel expert calibration, J. It is a continuous time model that operates on daily time steps and uses a command structure for routing runoff and chemical through watershed. The balance between population and available water already makes Pakistan one of the most water stressed countries of the world. The problem of increasing water scarcity in Pakistan is multifaceted. A watershed is comprised of land areas and channels and may have lakes, ponds or other water bodies.
© 2015 Faculty of Engineering, Alexandria University. It is vital factor for economic development and augmenting growth of agriculture and industry especially in the perspective of rapidly increasing population and urbanization. Based on four recommended statistical coefficients, the evaluation indicates a good performance for both calibration and validation periods and acceptable agreement between measured and simulated values of both annual and monthly scale discharge.The water balance components were correctly estimated and the Simly Dam inflow was successfully reproduced with Coefficient of Determination (R2) of 0.75.The use of a watershed model to simulate these processes plays a 1110-0168 © 2015 Faculty of Engineering, Alexandria University. fundamental role in addressing a range of water resources and environmental and social problems. The development of remote sensing (RS) techniques and Geographic Information System (GIS) capabilities has encouraged and improved the expanded use of watershed models worldwide. SWAT model was applied in large scale to evaluate the hydrological processes in a mountain environment of Upper Indus River Basin by Khan et al. The average yearly precipitation is about 1233 mm, most of which occurs during July-September and February-April. The highest and lowest mean minimum values of air temperature were observed to be 15.52 °C (2000) and 4.62 °C (1993) at Islamabad respectively, from 1990 to 2001, whereas, the highest and lowest mean maximum values of temperatures were remained 30.3 °C (2001) and 17.3 °C (1996) at the same period. Obviously, this analysis must be carried out on a watershed basis because all these processes are taking place within individual microwatersheds. Hydrological processes and their local scattering have always direct relation to weather, topography, geology and land use of watershed in addition to the impact of human activities. The objective of modeling Simly Dam watershed in Soan River basin, is to set up and calibrate the adapted model in order to simulate the functioning of the entire area and therefore predict its response to phenomena and risks it confronts such as erosion, inundations, drought, and pollution. The methodologies used for this study include a description of the study area, hydrological model and the special dataset which used in the simulation are given in the following sections with details. Description of the study area The Soan River is an important stream of the Pothohar region of Pakistan. 41 (2) (2004) 343-360, j.1752-1688.2005.tb03740.x. Specifically, the purpose is to estimate the volume inflow to the Simly Dam located at the outlet of the watershed in order to develop an efficient decision framework to facilitate, plan and assess the management of this important reservoir. Swat model was used successfully to estimate the water balance components in South eastern Ethiopia by Shawul et al. It originates from Murree hills and passes through the steep slopes (about 3.78%) and enters the plains near Chirah.