Nicole Meyer
Exercise 1
The above graph shows upstream drainage areas that are heavily urbanized. This graph does not consider upstream
area; rather, if focuses on the area in which the selected streams exist. These selected streams are primarily North
and East of Jordan Lake.
The above graph considers upstream area. The layer cumurban_stream means that the urban area is 20% out of the
total area. The total area is from upstream to a selected stream position. Similar to the above graph, the selected
streams are to the North and East of Jordan Lake. North of the lake is New Hope Creek, which is an area affected.
The above graph shows areas that have cumulative urbanized upstream areas, but local catchments areas that are
not urban. Essentially, this graph demonstrates that local watersheds around Jordan Lake are in fact urban. The
areas affected include Northeast Creek, Swift Creek, Walnut Creek, Little Creek, Ellerbe Creek, Crabtree Creek and
several others. A small portion of New Hope Creek is affected by this area.
The above map shows that the New Hope Creek area is in more relation to the urban_stream and
cumurban_stream than the cumurban_nourban_stream.
Q2. Comparing to step 1 results, the urban areas that correspond to high stream discharge are the areas to the
North and East of Jordan Lake. However, New Hope lies within the Northern part of the actual watershed. These
areas are of importance because as urban land use grows there becomes a rising concern for allocating water
resources and an increased potential to pollute the Lake. The more people in the area means the more water that is
used and also the more waste that is produced.
High stream discharge areas are overlapped mostly with urban and cum_urban stream. Since runoff from
urban is characterized by surface runoff, which is direct, fast and wash-off the contaminants in impervious
area, it threatens water quality problem to Jordan Lake (-1.0).
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