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Hydrological impact assessment of alternation in the catchment dynamics- case study of Wazirabad, Sikanderpur Ghosi and adjusting watershed

Student name: Ms Sakshi Ghildiyal
Guide: Ms Ranjana Ray Chaudhuri
Year of completion: 2019
Host Organisation: Gurugram Metropolitan Development Authority, Gurugram
Supervisor (Host Organisation): Mr Rajbir Singh Bondwal
Abstract:

Sub urban area are dominant part of developing Nations. Majorly the development in such areas are economically driven. Such developments negatively influencing the natural resources. Gurgaon is one such city where the rapid industrial development has induced changes in the natural cycle. The change in the land use has modified the atmospheric condition of the region. Thus there is a need to direct research attention towards understanding how this urban growth would influence the resources available. Every human settlement has an impact in the hydrological cycle. This study explores the impact of urbanization on the hydrology of the region.

For the hydrological studies, the analysis have been carried out in two parts considering the metrological and surface dynamics. Statistical analysis have been carried out on the climatic parameters to quantify the impact that the urbanization has on atmospheric condition. The analysis includes long term trend detection, analysis of optimum range and stimulation modelling. The software R has been used for this purpose. For trend detection and significance Mann kindle test and Sen slop function has been used. To increase the accuracy and accounting for the climatic variation and limited data availability, Bayesian statistic have been used. Multiple MCMC algorithms have been run on the available data set and further analysis have been done on results obtained. For simulation modelling multiple regression modelling have been done.

The drainage basin analysis was done in QGIS and HEC HMS. Using the digital elevation model catchment have been delineated and further analysed determination of streams and flow direction. The land use land cover map have been created to calculate curve number for the sub basins obtained. For runoff calculation different simulated rainfall have been used in HEC HMS. The result of the analysis have been used to understand and identify the water management strategy for the basins. The study is a statistical approach toward quantifying the hydrological impact of the rapid urbanization in Gurgaon and is meant to provide a research base for further watershed management strategies.