Application of nonlinear least-squares regression to ground-water flow modeling, west-central Florida

Original publisher: Tallahassee, Fla. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor], 2000. OCLC Number: (OCoLC)53867004 Subject: Groundwater flow -- Florida -- Mathematical models. Excerpt: ... PRECIPITATION INTERCEPTION ET HSPF INFILTRATION PERCOLATION REJECTED RUNOFF ET RECHARGE RECHARGE UNSATURATED STREAM WATER TABLE CHANNEL ZONE SATURATED ZONE BASE FLOW VERTICAL SAS HORIZONTAL FLOW LEAKAGE MODFLOW ICU VERTICAL UFA LEAKAGE HORIZONTAL FLOW EXPLANATION ET is evapotranspiration SAS is surficial aquifer system ICU is Intermediate aquifer system UFA is Upper Floridan aquifer Figure 5. Primary components of the surface-water system simulated by HSPF and the ground-water system simulated by MODFLOW. corresponding subbasin and reach numbers from HSPF were assumed to behave in the same way as the surfi-to individual cells in MODFLOW are linked in the cial aquifer system. Wetlands are modeled as river CNTB model using a Geographic Information System cells in layer 1. Springs are represented by one or more ( GIS ). The integrating software translates HSPF drain cells in model layer 2. Several boundary condi-results ( hourly increments ) into stress periods used by tions were used to constrain the lateral extent of the MODFLOW ( weekly ), and MODFLOW results are simulated flow system. Based on regional ground-partitioned into appropriate periods for HSPF. water flow, most of the lateral extent in layer 1 is a no-flow boundary, except where the boundary coincides Areally, the CNTB area hydrologic model is with the coastline of the Gulf of Mexico and Tampa divided into a grid of 131 rows by 121 columns, with Bay, which are represented in the model as specified 2 0.25 mi cells in the center of the model and cells up to heads. In layer 2, the southeastern and most of the 2 1 mi elsewhere ( fig. 6 ). The ground-water part of the northern boundaries are no flow boundaries represent-CNT...