The book provides a comprehensive insight into watersheds and modeling of the hydrological processes in the watersheds. It covers the concepts of watershed hydrology and watershed management in depth. The basic types, of soil erosion and its measurement and estimation of runoff and soil loss from the small and large watersheds are discussed. Recent advances in the watershed management like the application of remote sensing and GIS and hydrological models are a part of the book. The book serve as a guide for professional and competitive examinations for undergraduate students of Agriculture and Agricultural Engineering and graduate students of Soil Science, Soil and Water Engineering, Agricultural Physics, Hydrology and Watershed Management.

Most imperative environmental concerns are Cultural eutrophication pertaining to industrialization and urbanization which lead to proliferation of weeds in aquatic environs disturbing these ecosystems. Alarming increase in CO2, CH4, CFC’s, N2O and water vapour in the atmosphere cause enhanced greenhouse effect, among all these CO2 is accountable for 55-60 % of  total enhanced effect. Phyto- and Nutrient sequestration via plants helps storage of atmospheric CO2 in the vegetation to get rid of  contaminants. Carbon and nutrient sequestration can be braided together for sustainable development goals. The chapters  adopt the hierarchy as follows: significance of quality environs, quantification and bio-monitoring of culprit contaminants, the issues relevant to global warming and accelerated eutrophication and their ecological impacts followed by various sequestration technologies.