New Jersey Water Science Center
Great Falls of the Passaic River at Paterson, N.J.
USGS IN YOUR STATE
USGS Water Science Centers are located in each state.
Delaware NAWQA SPARROW
Project Title: NJ179 Delaware NAWQA SPARROW
The model as currently designed will explore factors that affect nutrient transport in the Delaware Basin. Major refinements being developed for the model that will make it more useful at a local level include:
SPARROW modeling will be used to:
Statement of Problem
To date SPARROW models have shown that land-to-water delivery losses of nutrients are significant. What processes are responsible for these 'losses' is uncertain. Certainly some of this 'loss' is storage and transport in groundwater systems. It is expected, and recent studies have suggested, that on local and regional scales topography and soil types are important factors in transport processes. In addition, the distance of a particular land use from a stream channel or point of measurement will influence transport and attenuation processes. By combining land-use, soils, topography, and distance in a GIS based weighting scheme it should be possible to determine what factors are important for over-land transport of different constituents. Inclusion of these factors in a regional SPARROW model will allow for a more rigorous exploration of land-to-water processes and allow for a more complete analysis of data for the CENR program.
Strategy and Approach
SPARROW modeling is a major part of the USGS/NAWQA contribution to the CENR effort. USGS personnel on the Delaware NAWQA study will develop the data sets and run the model. Assistance will be sought from USSG staff in Reston Virginia, and Baltimore, Maryland, who have previous experience with the model. Development of slope and distance weighting factors will be coordinated with on-going efforts in the New Jersey District. Acquisition of data sets from other agencies will be coordinated through the NAWQA/CENR effort. Work will be conducted in three phases: