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- Ground-Water Recharge in Southwestern US
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Comparison of Selected Methods for Estimating Ground-Water Recharge In Humid Regions

Sorted by Typical Quantity Estimated

Select Methods to Compare	METHOD	CATEGORY	SPATIAL SCALE	TEMPORAL SCALE	TYPICAL QUANTITY ESTIMATED	EASE OF USE	DATA NEEDS	RELATIVE COST
	Stream Base-Flow Analysis	Streamflow Methods	Watershed	Years	Net Recharge	Easy	Low	Low
	Recession-Curve Displacement	Streamflow Methods	Watershed	Event to Years	Net Recharge	Moderate	Low	Low
	Zero-Tension Lysimeters	Unsaturated Zone Methods	Point	Day to Years	Potential Recharge	Difficult	Low	High
	Deep Percolation Model	Water Budget	Regional	Day to Years	Potential Recharge	Moderate	Moderate	Moderate
	HELP3 Model	Water Budget	Point to Regional	Day to Years	Potential Recharge	Easy	Low to Moderate	Moderate
	Zero-Flux Plane	Unsaturated Zone Methods	Point	Day to Years	Potential Recharge	Difficult	High	High
	Darcian Methods	Unsaturated Zone Methods	Point	Long-Term Average	Potential Recharge	Moderate	Low	High
	Seepage Meters	Streamflow Methods	Point	Event to Months	Potential Recharge	Moderate	Low	Low
	Streamflow Gain/Loss Measurements	Streamflow Methods	Local	Instantaneous	Potential Recharge	Easy	Low	Low
	Watershed Models	Streamflow Methods	Watershed /Regional	Days to Years	Recharge	Moderate	High	High
	Temperature	Tracer Methods	Point	Days to Years	Recharge	Moderate	Moderate	High
	Ground-Water Modeling	Ground-Water Methods	Local / Regional	Month to Years	Recharge	Moderate	High	High
	Tritium	Tracer Methods	Point	Month to Years	Recharge	Moderate	Moderate	High
	Chloride	Tracer Methods	Point	Years	Recharge	Easy	Moderate	Moderate
	Chlorofluorocarbons	Tracer Methods	Local	Month to Years	Recharge	Difficult	Moderate	High
	Water-Table Fluctuations	Ground-Water Methods	Local	Day to Years	Recharge	Easy	Low	Low

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Page Last Modified: Friday, 01-Aug-2008 12:14:49 EDT