MODRSP is program used for calculating drawdown, velocity, storage losses and
capture response functions for multi - aquifer ground -water flow systems. Capture is
defined as the sum of the increase in aquifer recharge and decrease in aquifer discharge
as a result of an applied stress from pumping [Bredehoeft et al., 19821. The capture
phenomena treated by MODRSP are stream- aquifer leakance, reduction of
evapotranspiration losses, leakance from adjacent aquifers, flows to and from prescribed
head boundaries and increases or decreases in natural recharge or discharge from head
dependent boundaries.
The response functions are independent of the magnitude of the stresses and are
dependent on the type of partial differential equation, the boundary and initial
conditions and the parameters thereof, and the spatial and temporal location of stresses.
The aquifers modeled may have irregular -shaped areal boundaries and non -homogeneous
transmissive and storage qualities. For regional aquifers, the stresses are generally
pumpages from wells. The utility of response functions arises from their capacity to be embedded in
management models. The management models consist of a mathematical expression of
a criterion to measure preference, and sets of constraints which act to limit the
preferred actions. The response functions are incorporated into constraints that couple
the hydrologic system with the management system (Maddock, 1972). MODRSP is a modification of MODFLOW (McDonald and Harbaugh, 1984,1988). MODRSP uses many of the data input structures of MODFLOW, but there are major differences between the two programs. The differences are discussed in Chapters
4 and 5. An abbreviated theoretical development is presented in Chapter 2, a more
complete theoretical development may be found in Maddock and Lacher (1991). The
finite difference technique discussion presented in Chapter 3 is a synopsis of that
covered more completely in McDonald and Harbaugh (1988). Subprogram organization
is presented in Chapter 4 with the data requirements explained in Chapter 5. Chapter
6 contains three example applications of MODRSP.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/620142 |
| Date | January 1991 |
| Creators | Maddock, Thomas, III, Lacher, Laurel J. |
| Contributors | Department of Hydrology & Water Resources, The University of Arizona |
| Publisher | Department of Hydrology and Water Resources, University of Arizona (Tucson, AZ) |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Technical Report |
| Source | Provided by the Department of Hydrology and Water Resources. |
| Rights | Copyright © Arizona Board of Regents |
| Relation | Technical Reports on Hydrology and Water Resources, No. 91-020 |
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