Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil

Bibliographic Details
Main Author:	Toledo De Leon, Rogelio
Language:	English
Published:	The Ohio State University / OhioLINK 2014
Subjects:	Agricultural Engineering
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=osu1417713887

id	ndltd-OhioLink-oai-etd.ohiolink.edu-osu1417713887
record_format	oai_dc
spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-osu14177138872021-08-03T06:28:23Z Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil Toledo De Leon, Rogelio Agricultural Engineering On-Site Wastewater Treatment Systems (OSWTS) do not have the ability to properly function when saturated soil conditions are present. Saturated soil conditions cause a hydraulic short circuit in the system and can result in improper treatment of effluents. Contamination of groundwater bodies and surface water is a result of deep percolation of the untreated effluent. Contaminants found in water near an OSWTS that poorly treats the effluent due to hydraulic failure can range from high concentration of nutrients to one of greater concern, fecal coliform bacteria. These contaminants, such as nitrogen, phosphorus, pharmaceutical and personal care products (PPCP), viruses, and fecal coliform bacteria, have an adverse impact on human health as well as on the environment. Some of the impact from these contaminants include: eutrophication of water bodies, harmful algal blooms, drinking water quality concerns, human disease, and PPCP’s in water bodies, which studies suggest can lead to ecological and human harm. Often, the installation of engineered drains, commonly known as curtain drains, within an OSWTS are used to lower the seasonal high water table to prevent saturated soil conditions and the interaction between partially treated or untreated wastewater with adjacent water bodies.DRAINMOD (Skaggs, 1978), a water management model, was used for the hydrological evaluations of a matrix of drain depths and spacing combinations between leach lines and engineered drains, for a field scale project located at the Union County Soils Research Laboratory, Union County, Ohio (US). Simulations were conducted over a time period of thirty years for three different soil descriptions under Blount Soil Series (Blount Site Specific (BSS), Blount Silt Loam (BSL) and Blount Loam (BL)) 0 to 2% slope, and five different climate records (Fulton for the Counties of Mercer, Seneca, Shelby, and Union). Moreover factors analyzed in this research study were climate records, soil descriptions, drain depth and spacing as individual factors, and drain depth and spacing combinations. Factors were analyzed based on the depth and duration of the water table below ground surface.Results analysis indicated that there was significant evidence for factors (climatic records, soil descriptions, drain depth and spacing combinations, and drain depth or drain spacing) effect on the mean number of days (NOD) that the water table depth criteria were equaled or exceeded. Furthermore, drain depth was considered the most influential factor on the mean and total NOD that the water table depth criteria were equaled or exceeded, followed by soil description, drain spacing, and climate record. Moreover, for all soils descriptions under all simulated climate records, drain depth and spacing combination of 1.5 m and 3.6 m, respectively, provided the most benefits in terms of lowering the high seasonal water table, minimizing the probability or likelihood of a potential failure events. Finally, results from this study strongly support that by the installation of engineered drains the water table depth can be lowered thereby minimizing the potential failure of an OSWTS. 2014 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1417713887 http://rave.ohiolink.edu/etdc/view?acc_num=osu1417713887 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Agricultural Engineering
spellingShingle	Agricultural Engineering Toledo De Leon, Rogelio Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil
author	Toledo De Leon, Rogelio
author_facet	Toledo De Leon, Rogelio
author_sort	Toledo De Leon, Rogelio
title	Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil
title_short	Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil
title_full	Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil
title_fullStr	Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil
title_full_unstemmed	Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil
title_sort	predicting hydrological performance of engineered (curtain) drains for on-site wastewater treatment systems installed in poorly drained soil
publisher	The Ohio State University / OhioLINK
publishDate	2014
url	http://rave.ohiolink.edu/etdc/view?acc_num=osu1417713887
work_keys_str_mv	AT toledodeleonrogelio predictinghydrologicalperformanceofengineeredcurtaindrainsforonsitewastewatertreatmentsystemsinstalledinpoorlydrainedsoil
_version_	1719437441559953408

Predicting Hydrological Performance of Engineered (Curtain) Drains for On-Site Wastewater Treatment Systems Installed in Poorly Drained Soil

Similar Items