Soil Condition
Separate closed feature--Lake or Pond Others ---Stream
Surface Water Resource
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Run 0ff Index
Poor Drainage Index
Impervious Surface Index
Surface Water Sensitivity & Sub Basin Zone Average Index
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Distance Index From Water Feature
Different buffer distance for main stream, sub stream and lake/pond
Urb a n i z e A r e a
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Buffer Surface Water
Slope
Impervious
Land Use
Pollution
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Impervious Area
The purpose is to exclude really short feature which are not obvious, at the same time mimic a width for water feature.
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Farm Land
Water Resource Sensitivity Analysis Huron River Watershed In southeastern Michigan, the Huron River Watershed spans a land area of more than 900 square miles and drains water to the Huron River through hundreds of tributary creeks and streams. The river itself flows more than 125 miles from its headwaters at Big Lake, near Pontiac, to its mouth at Lake Erie. The river’s drainage area includes seven Michigan counties (Oakland, Livingston, Ingham, Jackson, Washtenaw, Wayne, Monroe), 63 municipal governments, and a half million residents. Huron river watershed area has abundant of water resource. However, water resource quality issue still existing. This project focuses on water quality, both for surface water resource and underground water resource. This analysis considers different factors might affect the water quality. The surface water is mainly affected by impervious area runoff; the underground water is affected by fertilizer and other chemical things, which will infiltrate through soil. The outcome map is to provide a potential sensibility map consider above factors. The limit of this analysis is lacking the real monitoring water quality data which coordinate to the geographic location; during analysis process, assumption are made, some of which might not be appropriate, that is another limit. To improve this analysis process, need more understanding the relationship between influence factors and sufficient data support.
Well Drainage Index
Underground Watertable Depth Crop Land
Farm Land Distance Index Closeness to UG Watertable
Farm Land
Water Resource
Underground
Main Underground Water
Reclassify land use, exclude less important feature.
Map Scale: On map
Data Resource: National Landcover raster, Impervious raster data, Cropland raster data come from The USGS Land Cover Institute (LCI) website. County wide topography DEM raster comes from USGS TNM website. Hydrology feature classes come from Michigan Geo Library. County Boundary comes from Michigan Geo Library. Soil feature and data file comes from USDA soil survey web site. Projection: NAD 1983 State Plane Michigan South FIPS 2113 Feet Intl Map Author: Zhenzhen Zhang
Underground Water Sensitivity & Sub Basin Zone Average Index
For both surface water and underground water, the idea is to build a certain distance. Within this distance, all site condition factors will be considered affecting the water quality. The higher index, the more serious condition will be. Selection, Reclassify, Euclidean Distance, Raster Calculator, Focal Statistics.