Jared RogersIRWIN PRAIRIE

GROUNDWATER FLOW REGIME AND

DRAINAGE

World groundwater supply = .61% (Fetter 2001)Groundwater accounts for >98% of available fresh water globally

Relationship to wetlandsWater filtration and storageNutrient cycling and transport retentionFlood attenuation

Better knowledge = Better management

INTRODUCTION: HYDROLOGY SIGNIFICANCE

Irwin Prairie State Nature PreserveSeasonal wetland

Sub-ecotoneswet prairieSedge meadow Swamp forest

Peat layer (confining unit)Unconfined sand aquiferClay aquitard beneath

INTRODUCTION: SITE DESCRIPTION

Photo by: Dr. Todd Crail 12/1/2011

Wet Period

Standing Water

Measure heads in piezometers and the wetland

Determine Surface-water and groundwater interactions

Recharge and dischargePlot potentiometric map to determine GW

flow directions

OBJECTIVE

Standing Water?

METHODSBancroft Avenue

Irwin

Roa

d

Dorr Street

Installationby Kirk Zmijewski

METHODS

ELECTRONIC SOUNDING TAPE

Wee

kly

Prec

ipita

tion

(inch

es)

From wunderground.com (2013)00.5

11.5

22.5

33.5

44.5

Precipitation

Date

Wetland bottom elevation Pole-E

RESULTS

668

667

666

665

664

Sept. 15, 2013ft. amsl

Weekly measurementsDrawdown rate

B-North and Pole W too far

DISCUSSION

GW flow directionDivergent and convergent flow

GW and surface-water interactionGW discharges to the wetland Wetland recharges GW in Sept.

CONCLUSION

Dr. James Martin-HaydenDr. Todd CrailMr. Kirk ZmijewskiMr. Ryan Schroeder

Ohio Department of Natural Areas and Preserves

ACKNOWLEDGEMENTS

Fetter, C.W. Applied Hydrogeology 4 th Ed. New Jersey: Prentice-Hall, Inc. 2001. Text.

REFERENCES