Christina Basin Trends, 1995-2010 Population Land Use Water - PowerPoint PPT Presentation

Christina Basin Trends, 1995-2010 • 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 Task Force Del. Co-coordinator: DNS, WRA Chair: BVA Pa. Co-coordinator: CCWRA, CCCD Partner Organizations Pennsylvania Interstate Delaware • Chester County Conservation • Brandywine Conservancy • Christina Conservancy District (CCCD) • Brandywine Valley Association (BVA) • City of Newark • Chester County Health • Delaware River Basin Commission (DRBC) • City of Wilmington Department • Partnership for the Delaware Estuary • Delaware Department of • Chester County Planning • Red Clay Valley Association (RCVA) Natural Resources and Commission • United States Department of Agriculture Environmental Control • Chester County Water Resources Natural Resources Conservation Service (DNREC) Authority (CCWRA) (NRCS) • Delaware Nature Society (DNS) • Pennsylvania Department of • United States Environmental Protection • New Castle Conservation Conservation and Natural Agency (USEPA) District Resources (Pa. DCNR) • United States Geological Survey (USGS) • New Castle County Dept. of • Pennsyvlania Department of the • United States National Park Service (NPS) Special Services Environment (Pa. DEP) • White Clay Creek Watershed Association • University of Delaware, Institute • White Clay Creek Wild and Scenic for Public Administration, Water Watershed Management Committee Resources Agency (WRA) Ad Hoc Committees (as needed)

Christina Basin Population Source: U. S. Census

Christina Basin Population, 2010 White Clay Cr. 123,506, 21% Brandywine Cr. 246,702, 42% Red Clay Cr. 46,893, 8% Christina R. 174,196, 29%

Christina Basin Population Change, 2000-2010 35,000 31,091 30,000 25,000 Population change 20,000 15,000 10,723 10,000 5,000 426 0 Delaware Pennsylvania Maryland

Christina Basin Population Change, 2000-2010 42,240 45,000 40,000 35,000 Population change 30,000 25,289 25,000 20,000 15,000 7,761 10,000 4,927 4,263 5,000 0 Brandywine Christina Red Clay White Clay Christina Creek River Creek Creek Basin

Christina Basin Population Change, 2000-2010 25,000 21,950 20,000 15,000 10,000 7,204 5,782 3,339 3,228 5,000 426 1,035 131 0 White Clay (PA) Brandywine (PA) White Clay (DE) Christina (PA) Red Clay (PA) Brandywine (DE) Christina (MD) Red Clay (DE) Christina (DE) -5,000 -855

Christina Basin Population Change, 2000-2010 3,500 2,500 1,500 500 -500 -1,500 -2,500 -3,500 . . k R k n e e h n n e n r n k k n h e e h d k k k e C e u l u e o u l c l o u r e l r u c c e a a a l e l a e i a o R a R e o R n t R e d R n d v g n e d y r F n r w a d r r a s C a r r C d a d n d y C B n y C C i e k r e t e s r r o l o B i s s o d C c B o B d l o h m e N d y t d i l o o a r y i o d D u v d r g k e M a e e l d e h W W e B t W o A t u s i i s u e u W v a o n l P l C M 6 t d C M l o a e v i o a h a 5 h r 5 w e B e d w o r B E W e V l W H B h 6 C v W r B v i a 2 o 2 o b M W B u g C o 2 o W l C d a 7 e 3 B B e 1 l u e b l B R b i 2 v 1 T a W 2 o b R b a 8 a 3 W 3 1 o B d r W B 6 B h B b 5 4 R 4 i T 1 E C t a R R R B 7 0 4 4 1 1 W 1 W B B

Christina Basin Land Use Source: NOAA CSC

Christina Basin Land Use, 2005 Water 1% Urban/ Suburban Forest/ 28% Wetland 33% Ag 38%

Red Clay Creek Brandywine Creek Land Use 2005 Land Use 2005 Water 1% Water Urban/ 1% Suburban Forest/ Urban/ Forest/ 18% Wetland Suburban Wetland 36% 27% 33% Agricultur Agricultur e e 46% 39% White Clay Creek Christina River Land Use 2005 Land Use 2005 Water Water 0% 1% Urban/ Forest/ Forest/ Suburban Urban/ Wetland Wetland, 34% Suburban 26% 30% 58% Agriculture 15% Agricultur e 36%

Christina Basin Land Use Change, 1996 - 2005 9.61 10 8 6 4 Area (sq mi) 2 0 2 4 - 3.06 6 8 - 6.72 10 Urban/Suburban Agriculture Forest/Wetland

Christina Basin Land Use Change, 1995 - 2010 5 4 3 2 Area (sq mi) 1 0 1 Brandywine Christina Red Clay White Clay 2 3 4 5 Urban/Suburban Agriculture Forest/Wetland

Christina Basin Land Use by State and Watershed, 2005 350 300 250 Area (sq mi) 200 150 100 50 0 B B C R W W C C R r r h e h h e h h a a r d r r d i i n n i i i t t s s s e e d d C C t t t i y y i i n l C C n n l a w w a a a a l l y y a a i i n n D M P y y P D e e E A A D P D E D P A E A E Urban/Suburban Agriculture Forest/Wetland

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)

Brandywine Creek at Wilmington Annual Low Streamflow 220 204 198 200 180 160 Streamflow (cfs) 137 140 124 121 121 119 120 98 98 94 100 90 90 80 7Q10 60 52 52 35 40 20 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

10% 1%

Red Clay Creek at Stanton Annual Low Streamflow 50 40 39 40 Streamflow (cfs) 30 28 24 21 20 18 18 17 17 16 14 12 10 8 7Q10 7 7 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Red Clay Creek at Stanton Annual Peak Streamflow 20,000 17,400 15,000 Streamflow (cfs) 10,900 1% 10,000 8,260 5,330 5,000 5,000 4,200 10% 3,780 3,140 3,050 2,170 1,850 1,370 864 800 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

White Clay Creek near Newark Annual Low Streamflow 100 90 86 80 Streamflow (cfs) 70 60 54 50 44 42 40 30 30 30 25 23 22 21 18 18 7Q10 20 9.3 8.5 10 5.4 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

White Clay Creek near Newark Annual Peak Streamflow 20,000 19,500 15,000 1% 13,900 Streamflow (cfs) 10,000 9,150 7,130 10% 5,600 5,540 5,090 4,970 4,630 4,390 5,000 3,160 2,870 2,050 1,920 1,270 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Christina River at Coochs Bridge Annual Low Flow 14 12 12 10 Streamflow (cfs) 8.3 8 5.9 5.9 6 3.7 3.7 4 3.4 3.4 2.5 2.4 2.1 7Q10 1.6 2 1.4 1.1 1 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Christina River at Coochs Bridge Annual Peak Streamflow 8,000 1% 7,050 7,000 6,000 5,430 Streamflow (cfs) 5,000 4,000 3,000 10% 2,350 2,340 2,130 1,990 1,910 1,910 1,840 1,790 2,000 1,770 1,500 1,330 1,080 1,000 629 0 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Summary • Water quality improvements are congruent with 15- year contributions of CBCWP. • Water quality has improved even with 42,000 increase in population (2000-2010) and 9 mi 2 increase in urban/suburban land (1996-2005). • 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.