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| Titel |
RRAWFLOW: Rainfall-Response Aquifer and Watershed Flow Model (v1.15) |
| VerfasserIn |
A. J. Long |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 8, no. 3 ; Nr. 8, no. 3 (2015-03-30), S.865-880 |
| Datensatznummer |
250116192
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| Publikation (Nr.) |
 copernicus.org/gmd-8-865-2015.pdf |
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| Zusammenfassung |
| The Rainfall-Response Aquifer and Watershed Flow Model (RRAWFLOW) is a
lumped-parameter model that simulates streamflow, spring flow, groundwater
level, or solute transport for a measurement point in response to a system
input of precipitation, recharge, or solute injection. I introduce the first
version of RRAWFLOW available for download and public use and describe
additional options. The open-source code is written in the R language and is
available at http://sd.water.usgs.gov/projects/RRAWFLOW/RRAWFLOW.html along
with an example model of streamflow. RRAWFLOW includes a time-series process
to estimate recharge from precipitation and simulates the response to
recharge by convolution, i.e., the unit-hydrograph approach. Gamma functions
are used for estimation of parametric impulse-response functions (IRFs); a
combination of two gamma functions results in a double-peaked IRF. A spline
fit to a set of control points is introduced as a new method for estimation
of nonparametric IRFs. Several options are included to simulate time-variant
systems. For many applications, lumped models simulate the system response
with equal accuracy to that of distributed models, but moreover, the ease of
model construction and calibration of lumped models makes them a good choice
for many applications (e.g., estimating missing periods in a hydrologic
record). RRAWFLOW provides professional hydrologists and students with an
accessible and versatile tool for lumped-parameter modeling. |
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