Author(s): Gopal M. Naik; Zainab Masood; Srinivas G.
Linked Author(s):
Keywords: Urban Watershed Modeling; Geographical Information System; Remote Sensing
Abstract: In this study the Osmania university campus area is considered as case study. The altitude ranging between 490m-538m with red sandy loamy soils, falls in survey of India toposheet number 56k/11/NW of the scale 1:25000, it is geo-referenced so that they provide geographic context for other data. The vector data capture used in this project is Global Positioning System (GPS) and the GPS Survey is done using Trimble Juno 3D. The satellite images are collected from NRSC. The images are Resourcesat-2 and were taken on the date 03-DEC-2011. They were georeferenced with the resolution of 5 meters. The daily and monthly historical metrological data has been collected from IMD for a period of 2 and 5 years respectively. The base map, storm water map, DEM, slope map and LULC are generated and this analyzed data is used as an input to the model. The watershed modeling is generally used to refer to the simulation of processes that takes place in watersheds. The aim of watershed modeling is to gain better understanding of hydrologic phenomena operating in a watershed and of how changes in the watershed may affect these phenomena. Models developed for this purpose are usually physically based deterministic models. Peak flow can be estimated by well-documented empirical and rational methods, but they cannot give time distribution of runoff and continuous modeling of the urban catchment. Hence, an attempt has been made in this study to incorporate spatial and temporal variations of the meteorological and watershed characteristics and SWMM has been used. In the Info SWMM model junction nodes are created which comprises part of drainage network, the depth and elevation in creation of junction nodes. The junction elevations are extracted from DEM and slope. A time vs intensity graph is attained along direction of flow in storm water drains. Profile plot of selection portion of pipe.
Year: 2014