Raster Based GIS Conference

Potential Water Wells for Nebraska

The world is changing as we know it which influences the weather. One of these weather changes is increasing dry seasons which can lead to droughts. Droughts cause crops to die out due to insufficient water and that insufficient water also causes a risk for people as well. My GIS project is a spatial analysis on the state of Nebraska to determine areas/counties that need a water source for easier access to farmlands and cities/towns. This was chosen since Nebraska is one of the states more susceptible to droughts and had a huge drought season from 2002 to 2008. The analysis gives ranks to three aspects, larger cities since they can have the resources needed to get the water, the water wells already in the state, and the population of each county. Each aspect is given a new field called rank and each record is given a record based on distance from well, population, and the area size of city/town. Once each aspect has a rank value I union them together and create another field called Overall Rank. This field is calculated using the following equation to give that rank value; Overall Rank = (CityRank*.3 + WellRank*.3 + PopRank*.4). The resulting Overall rank can then tell me which areas have a higher priority in needed water. My results showed that additional water wells would be built in the eastern region near Omaha. This is not what I was expected, and I feel that a few issues came from my calculations of layers caused this. If given the opportunity I would include vacant land to see what space is available to build such water sources, and have them built in the western region of state.

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