baseline conditions

Baseline ConditionsBaseline Conditions

General General HydrogeologyHydrogeology

Schematic Cross-sectionSchematic Cross-section

Bedrock

Modeling based on GWIM data matches surprisingly well with the SWL w/o calibration

SWL/DataSWL/Data778-920 ft778-920 ft

ModelModel782-922ft782-922ft

Reality CheckReality Check

Comparison with Comparison with Observed BaseflowObserved Baseflow

0.07, 0.08

0.00, 0.05

0.42, 0.41

Flow ≈ 0.02 cfs

Flow ≈ .04 cfs

6.61, 6.38

0.68, 0.73

0.45, 0.071.34, 1.45

Flow ≈ 6.5 cfs

Flow ≈ 0.56 cfs

3.33, 2.55

13.82, 14.85

21, 29

Flow ≈ 9.4 cfs

Flow ≈ 3.9 cfs

Total Flow ≈ 23.75 cfs

Measured & Predicted Stream Flows

0

5

10

15

20

25

30

35

Osborne Road Cobb Road 43rd St 44th St M89 USGS

Locations

Flor

Rat

e (c

fs) Data: Aug 26

Data: Oct 9

Model

Measured & Predicted Stream Flows

0

5

10

15

20

25

30

35

Osborne Road Cobb Road 43rd St 44th St M89 USGS

Locations

Flor

Rat

e (c

fs) Data: Aug 26

Data: Oct 9

Model

Testing Testing Management Management

OptionsOptions

Assessing the effectiveness Assessing the effectiveness of Management Scenariosof Management Scenarios

Changes in Land-use/Land Changes in Land-use/Land Management PracticesManagement Practices

Corn Corn Brome grass Brome grass Rate of recharge 12 in/yr Rate of recharge 12 in/yr → 16.5 in/yr→ 16.5 in/yr

Corn Corn Medium Density Residential Medium Density Residential Rate of recharge 12 in/yr Rate of recharge 12 in/yr → 8.3 in/yr→ 8.3 in/yr

Corn Corn Corn-winter Wheat Corn-winter Wheat Rate of recharge 12 in/yr Rate of recharge 12 in/yr → 11.5 in/yr→ 11.5 in/yr

Model OutputModel Output

Simulation ResultsSimulation Results

CornCorn Urban UseUrban Use

Model OutputModel Output

Simulation ResultsSimulation Results

CornCorn Brome grassBrome grass

Sub-model MapsSub-model Maps

Corn Brome grass

Sub-model MapsSub-model Maps

Corn Urban use

Well Location: Well Location:

Upstream vs. DownstreamUpstream vs. Downstream

Well Depth: Well Depth:

Shallow vs. DeepShallow vs. Deep

Put in a high capacity well Put in a high capacity well

Shallow wellShallow wellUpstream

Downstream

Shallow WellsShallow WellsBefore Wells Upstream Downstream

Shallow WellsShallow Wells

Before Wells Upstream Downstream

Deep wellDeep wellUpstream

Downstream

Deep WellDeep WellBefore Wells Upstream Downstream

Deep WellDeep Well

Before Wells Upstream Downstream