RAINFALL RUNOFF MODELLING CONSIDERING THE IMPACT OF LULC AND CLIMATE CHANGES ON MUSI RIVER BASIN

Abstract

Hydrological responses of a catchment are influenced by surface dynamics and various climate change factors. Therefore, any type of change if occurs in these factors will impact water balance cycle, and also affects natural resources and humans. The main parameters that control the water cycle are evapotranspiration, precipitation, temperature, Windspeed, solar radiation and humidity and these parameters in return affects other basin parameters such as groundwater recharge, streamflow, water yield and surface runoff. Various other climatological changes and spatio-temporal changes in basin may also affect these above parameters. Therefore, it became very important to assess and investigate these changes in a catchment to avoid any upcoming extreme events. These extreme events may include snowmelt in Himalayan region and floods due to increasing temperature, global warming or due to changes in rainfall patterns. Because of unprecedented growth in urban areas, we are observing enormous changes in landuse and landcover. And these LULC changes causing very much impact of hydrological parameters. This study is about how these changing landuse and climatic factors affecting the watershed or a river basin in a semi-arid region because of rapidly increasing urbanisation in nearby areas to the river basin. And this study needs large amount of data like temperature data, rainfall data and streamflow of catchment for analysis.