By Guest Blogger: Martha Corrozi Narvaez
Associate Policy Scientist, Water Resources Agency, Institute for Public Administration, University of Delaware
On an unseasonably warm Sunday in February I walked hand-in-hand with my 4-year old son along Wilmington’s riverwalk that parallels the magnificent Christina River. As we walked we passed by couples, families, runners, and people of all types with the musings of ice skaters in the background. My son and I talked about the ducks swimming by, the swift current carrying sticks and other debris and the “mean people” that littered their bottles and trash in the river. I couldn’t help but think that just a few years ago I would not have been able to share this experience with him. I am fortunate to share such an experience with him and I also feel fortunate that I understand the complexity and state of this river.
It is easy to see that the Christina River has undergone an urban renaissance resulting in the Chase Center, Tubman-Garrett Riverfront Park, Christina Riverwalk, a variety of restaurants, high-rise residential buildings, the Blue Rocks stadium, and the DuPont Environmental Education Center’s wildlife refuge. This growth is spurred by people’s desire to be near the water and the aesthetic qualities it provides, yet beyond this beauty there is a complex, natural system at work.
The headwaters of the Christina River lie within the state of Maryland and enter Delaware west of Newark. The White Clay, Red Clay, and Brandywine creeks are tributaries of the Christina River. The Christina River is freshwater yet tidal from just south of the town of Christiana to its confluence with the Delaware River at Wilmington. Extensive tidal freshwater wetlands, including Churchmans Marsh, exist along the lower Christina. The majority of the Christina River watershed is located in New Castle County (DE). The Christina River is a mostly urbanized watershed with over 50% of the land cover developed. The watershed is the site of the Port of Wilmington, an important shipping link, and one of the largest importers of orange juice, Chilean grapes, bananas, and automobiles nationally.
The Christina River has its share of historic contamination. There are numerous contaminated sites bordering the river. Samples have indicated that there are toxics present at elevated levels in the water bodies of the Christina River watershed and fish consumption advisories have been posted for the river. According to the USEPA’s water quality standards the Delaware portion of the Christina River requires varying levels of pollution reduction for nitrogen, phosphorus and bacteria.
Although the Christina River has fallen victim to years of industry, improper land use and anthropogenic influences the story of the river is a positive one. The state is working diligently to clean up and redevelop the toxic sites along the river. The Christina River is also demonstrating improving trends for many water quality parameters. According to a recent article on water quality trends in Delaware’s streams by Gerald Kauffman and Andrew Belden, water quality trend analysis for long term (1970/1980-2005) and short-term (1990-2005) trends show improvement in the Christina River for numerous water quality parameters including: dissolved oxygen (DO), total suspended sediment (TSS), total phosphorus (TP), and total Kjedahl nitrogen (TKN). Positive trends for these parameters indicate improving conditions in the river. Additional parameters, including bacteria, which levels have historically been increasing, show a leveling off for long-term and short-terms trends over this same time period, another good news story.
We know that the Christina River is not a pristine, natural river system yet research shows that there are positive signs for the health of the water body. The efforts by so many locally, state-wide and regionally to improve the water quality has had a positive impact. And as the riverfront becomes more popular and a destination in the region, it is my hope that individuals will learn more about the river and help protect this valuable resource through individual stewardship. And over the years as I continue to walk along the riverfront I will feel fortunate to be able to share this river, which inspires and motivates me, with so many people, especially my son.
Join us at DEEC on April 16 at 3:30pm for National Water Dance to celebrate the Christina River through dance performances and exploration of the marsh for the wildlife calling it home.