1): (1) direct surface runoff, direct surface-water inflow to the stream (2) groundwater base flow, composed of the water that percolates downward until it reaches the ground water reservoir and then flows to surface streams as ground-water discharge (3) interflow, the subsurface flow, in concentrated format, moving at …
What causes baseflow?
Baseflow originates as precipitation that infiltrates to the subsurface and eventually discharges to streams. The amount of baseflow discharged to streams is influenced by many basin characteristics, including climate, soils, topography, and land cover.
What is a baseflow method?
The linear reservoir baseflow method, as its name implies, uses a linear reservoir to model the recession of baseflow after a storm event. It is the only baseflow method that conserves mass within the subbasin. Infiltration or percolation computed by the loss method is connected as the inflow to the linear reservoirs.
What is baseflow in geography?
Base flow is a portion of the stream flow that is not runoff; it is water from the ground, flowing into the channel over a long time and with a certain delay.
What is the baseflow index?
Baseflow Index, or BFI, is a measure of the ratio of long-term baseflow to total stream flow and it represents the slow continuous contribution of groundwater to river flow.
What does Baseflow measure?
Is Baseflow a constant?
Abstract A baseflow recession constant, which can be derived from a simple exponential equation, is used to characterize the behaviour of low flows. The derivation and quantification of the baseflow recession constant is of importance in low flow studies.
Is baseflow a constant?
What is the Baseflow recession constant?
[1] The base flow recession constant, Kb, is used to characterize the interaction of groundwater and surface water systems. Estimation of Kb is critical in many studies including rainfall-runoff modeling, estimation of low flow statistics at ungaged locations, and base flow separation methods.
What determines the baseflow recession constant in basins?
Vogel and Kroll (1992) show that the baseflow recession constant is related to both the basin hydraulic conductivity and drainable soil porosity.
What is the meaning of the word baseflow?
Here are all the possible meanings and translations of the word baseflow. Baseflow is the portion of streamflow that comes from “the sum of deep subsurface flow and delayed shallow subsurface flow”. It should not be confused with groundwater flow. Certain parameters of baseflow,…
What is the recession constant in hydrological modeling?
This method is better suited when general guidelines for watershed yield must be used to estimate the initial flow. The recession constant describes the rate at which baseflow recedes between storm events. It is defined as the ratio of baseflow at the current time, to the baseflow one day earlier.
What is the relationship between baseflow and streamflow hydrographs?
Baseflow can be separated from a total streamflow hydrograph by using a recession model based on the following relationship: Where Qt is the baseflow at any time t, Q0 is the initial baseflow (at the beginning of the storm event, t = 0) and k = exponential decay constant.
