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The Water Balance or Budget Equation
can be treated as the mother of all types of hydro-metereological
equations.The equation is derived from Law of Conservation of Mass and
Energy and states that inflow of water is equal to outflow of the
same.If there exist an unequality,then it will contribute to the
existing storage of water of the region.Precipitation and Inflows are
accounted under Inflow and Runoff,Ground Water Outflow(contributed by
infiltration) and Evapo-Transpiration is treated as Outflow.We can find
any one of the variables from the equation if the other ones are already
known.
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Subsurface Return Flow can be defined as that amount of
water which ex-filtrate back to the surface after being infiltrated in
the up-slope portion of the hill.
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journal papers even from the pdf; automatic suggestions of related
manuscripts from the topic of your mind map, etc.Download it from : http://www.docear.org/software/download/
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Drought can not be defined as Flood. No single definition is available for drought. The beginning and end of drought are difficult to identify. Drought can be, however, identified through various indicators such as rainfall, snowpack, streamflow, and more, and these indicators can be used to monitor drought. Different scientists and researchers have developed various indices to help determine the onset, severity, and end of droughts. Drought indices are multiparameter and based on long or short duration observation of data for such parameters which help them create a comprehensible big picture. A drought index value is typically a single number that is calculated based on the data of input parameters generally rainfall, snowpack, evapotranspiration, etc., and is interpreted on a scale of abnormally wet, average, and abnormally dry.( Reference ) The video below elaborates the concept : Although drought is very difficult to determine the significance of drought in agriculture, water...