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11	The Spatial Relationship Between Septic System Failure and Environmental Factors in Washington Township, Marion County, Indiana Hanson, Brian L. 04 1900 (has links) Indiana University-Purdue University Indianapolis (IUPUI) / Underground septic systems thrive or fail based on the relationship with their local environment. This paper explores ways environmental variables such as soil type, tree roots, degree of slope, and impervious surfaces affect on-site wastewater treatment systems. It also discusses the effects each of these variables may have on a septic system, and the resulting impact a compromised system may have on the surrounding environment. This research focuses on an approximately 20 square mile area of central Washington Township in Marion County, Indiana. This area of central Indiana contains a large septic system owning population in a sampling of different environments such as wooded areas, hilly areas, and a variety of different soil types. septic system septic failure soil type tree roots slope degree of slope impervious surfaces environment environmental variables environmental factors on-site wastewater treatment system Washington Township Marion County Broad Ripple LiDAR Tree Canopy soil processed soil Miami Crosby Brookston Genesee Hennepin flood plain outwash glacial till parcel property parcel septic tank effluent drain field biomat percolation drainage water table sewage run-off pollution nutrient pollution nitrogen phosphorus body of water home owner

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The Spatial Relationship Between Septic System Failure and Environmental Factors in Washington Township, Marion County, Indiana