1. Faculty Advisors: Loring Nies, School of Civil Engineering Chad Jafvert, School of Civil Engineering Si Luo, Department of Computer Sciences Julia Wiener, ESE Student

2. Problem What is the river´s water use rate? When you withdraw water downstream, was it previously used upstream? If so, how much are we reusing the water of the rivers? How many times? What would this imply in terms of inter-jurisdiction regulation/ collaboration/ ? Study case: Mississippi River

3. Mississippi River Watershed Largest in continental US Covers all or parts of 28 US States National importance: In food production Drinking Water source Recreational source Transportation Energy (e.g. cooling) Manufacturing Ecosystem Services … Source: Wikimedia Commons

4. Preliminary research – Small Basin HUC 05120201: Upper White Watershed White River flows through the City of Indianapolis Feeds the Morse Reservoir Supplies more than 1/3 Indianapolis drinking water An estimated 891,000 people live in Marion County (2010) Source: USGS

5. Methodology Asses water reuse by: Determining volume of water input into streams and river water bodies that occurs through facility discharges. Includes all NPDES permitted facilities. Determining the volume of water extracted from lotic sources. Include all drinking water plants and industries that use surface water. Evaluate the relationship between discharges-withdrawals and surface waters stream flow. Work at different HUC Levels Take USGS Gauging station stream flow measures as reference

6. Developing the Initial Data Set HUC 05120201 - Upper White Watershed Watershed Discharges: NPDES Facilities Flow in conduit Average Watershed Withdrawals: Significant Water Withdrawal Facilities (IDNR) Intake Sources Watershed “Balance” Point: Most downstream USGS Gauging Station 03354000 Located in Morgan Co. Source: IndianaMap

7. Results

8. Significance For low flow months all of the stream flow downstream of Indianapolis is “used” water This water has passed through some type of wastewater treatment facility This is called “Unplanned indirect potable water reuse” From December through July the fraction of “used” water ranges between 13 – 54% There are unaccounted for withdrawals (infiltration?) and discharges (urban & agriculture run-off). May lead to a radical change in the reuse-concept perception.

9. Issues to Manage Massive amount of water data collected and archived continuously Little coordination, integration or organization of the heterogeneous data sets There is a need to enable a wider and more research- oriented access to large-scale water resources data

10. Databases Data ECHO DNR (Withdrawals – Indiana) USGS GIS data NHD Plus -> Provides some integration but in GIS format EPA GIS Water data