Area of Watershed Volumeof Direct Runoff ER Ordinate of DRH OUHG •Unit hydrograph can be used to get the hydrographs for other rainfall events. The watershed or basin is defined by the surrounding topography, the perimeter of which is called a divide. Watershed analysis US Midwest summary Impacts of climate change on watershed hydrology are subtle compared to cycles of drought and surplus precipitation (PPT), and difficult to separate from effects of land-use change. –Example : If 1 hour unit hydrograph is known, it can be used to compute hydrograph of a three hour event. A large watershed can be managed in plain valley areas or where forest or pasture development is the main objective. The agricul- This module introduces watershed ecology by covering the following topics (Figure 2): Major landscape-defining processes: the physical template. Chapter 1 Hydrology Ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. In the US Midwest, increas-ing baseflow has been more attributed to increased annual cropping than climate change. Ground water hydrology 1. that may affect important watershed structural or functional characteristics. watershed size also depend on the objectives of the development and terrain slope. Generally, watershed is used to describe a small catchment (stream watershed), whereas basin is reserved for large catchments (river basins). In hilly areas or where intensive agriculture development is planned, the size of watershed … This section covers the physical processes which are shaping forces of ecosystems. Watershed and Stream order. Roots of watershed hydrology paradigms • Engineering hydrology (watershed based): –Flood, drought, water supply • Agricultural hydrology (field based): – irrigation, drainage, erosion, fertilization • Acid rain era: – coupling of field/hillslope based hydrologic/ biogeochemistry to catchment scales • … preferential flow PHYSICAL HYDROLOGY e.g. GROUND WATERHYDROLOGY Prepared by: Rebecca Sandra V III Civil-Surya college of Engg & Tech 2010-2014 2. Climate, hydrology, and GROUND WATER• Groundwater is water located beneath the earths surface in soil pore spaces and in the fractures of rock formations.• (Example calculations 6.11 Suresh and A watershed is the area of land that drains to a particular point along a stream Center for Watershed Protection PHYSICAL HYDROLOGY PHYSICAL HYDROLOGY Many hydrologic processes are non-linear PHYSICAL HYDROLOGY e.g. It is the highest elevation surrounding the watershed.

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