Christina Basin Trends, 1995-2010 Population Land Use Water Quality Water Temperature Streamflow Compiled by A. Homsey, S. Chatterson, E. McVey. S. Mack,

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Presentation transcript:

Christina Basin Trends, Population Land Use Water Quality Water Temperature Streamflow Compiled by A. Homsey, S. Chatterson, E. McVey. S. Mack, M. Narvaez, and G. Kauffman (University of Delaware)

Christina Basin Clean Water Partnership Policy Committee DRBC, USEPA, Del. DNREC, Pa. DEP Coordinating Committee Del. Co-coordinator: DNS, WRA Pa. Co-coordinator: CCWRA, CCCD Task Force Chair: BVA Interstate Brandywine Conservancy Brandywine Valley Association (BVA) Delaware River Basin Commission (DRBC) Partnership for the Delaware Estuary Red Clay Valley Association (RCVA) United States Department of Agriculture Natural Resources Conservation Service (NRCS) United States Environmental Protection Agency (USEPA) United States Geological Survey (USGS) United States National Park Service (NPS) White Clay Creek Watershed Association White Clay Creek Wild and Scenic Watershed Management Committee Pennsylvania Chester County Conservation District (CCCD) Chester County Health Department Chester County Planning Commission Chester County Water Resources Authority (CCWRA) Pennsylvania Department of Conservation and Natural Resources (Pa. DCNR) Pennsyvlania Department of the Environment (Pa. DEP) Delaware Christina Conservancy City of Newark City of Wilmington Delaware Department of Natural Resources and Environmental Control (DNREC) Delaware Nature Society (DNS) New Castle Conservation District New Castle County Dept. of Special Services University of Delaware, Institute for Public Administration, Water Resources Agency (WRA) Partner Organizations Ad Hoc Committees (as needed)

Christina Basin Population Source: U. S. Census

Christina Basin Land Use Source: NOAA CSC

Christina Basin Water Quality Dissolved Oxygen Total Suspended Sediment Enterococcus Bacteria Nitrogen Phosphorus Source: DNREC STORET Monitoring Stations

Brandywine Cr. at Footbridge (104011) Red Clay Cr. at Stanton (103011) White Clay Cr. at Old Rte 7 Br. (105071) Christina R. at Wilmington (106291)

Water Temperature

Streamflow Annual Low Flow (Drought) Annual Peak Flow (Flood)

7Q10

1% 10%

7Q10

10% 1%

7Q10

1% 10%

7Q10

1% 10%

Summary Water quality improvements are congruent with 15- year contributions of CBCWP. Water quality has improved even with 42,000 increase in population ( ) and 9 mi 2 increase in urban/suburban land ( ). Nitrogen levels are degrading probably due to atmospheric deposition (not good) and/or conversion of ammonia to forms of N with rising DO levels (a good thing!). No low flows since drought of 2002.