34 D8. Environmental Geoscience (Posters)

Monday, 19 March 2018
8:00 AM - 12:00 PM
Lake Champlain Exhibition Hall

THE IMPACT OF ECOFRIENDLY AGRICULTURAL LAND MANAGEMENT ON THE WATER QUALITY OF THE LOWER ESOPUS CREEK, NEW YORK

Paper number: 34-19
Program: Technical Sessions
Time: 8:00 AM – 12:00 PM

Authors

Abstract

Like all streams passing through transitions of developed environments, water quality in the Lower Esopus Creek is often at risk of contamination. Analysis of water chemistry was performed over a growing season to evaluate water quality evolution in a selected reach of the drainage basin. The intention was to determine the effectiveness of alternative farming practices applied by the Hudson Valley Farm Hub (HVFH) in Hurley, New York. Water quality variations were observed and contamination from the HVFH was distinguished from the influences of regional land use.

Prior to 2013, the HVFH relied on traditional farming procedures, and, since then, they have implemented new resilient farming techniques such as no tilling, bed scale agriculture, and eco-friendly applications of fertilizers and pesticides. An earlier study on Esopus water quality, prior to the implementation of new methods, included measurements of: pH, Temperature, Dissolved Oxygen, Ammonia, Nitrate, Conductivity, and Turbidity. The previously collected data provided a basis toward understanding the current health of the Esopus. Inclusion of a simulated rainfall experiment assessed soil erosion tendencies. Runoff yielded 340 Nephelometric Turbidity Units (NTU) on a tilled green bean parcel compared to 16.3 NTU on an untilled corn parcel, indicating significant reduction of soil erosion. Temporal changes in phosphate and nitrate concentrations were observed between six sampling dates. In an agriculturally dominant landscape, sites of unknown anthropogenic influence were observed having nitrate levels ranging between extreme values of 5.6 mg/L and 13.2 mg/L. Phosphate values ranged between 0.35 mg/L and 2.43 mg/L for these sites. Improved fertilizer application practices were credited to the HVFH, relative to all land use detected within the region. Results for total dissolved solids and several cation and anion species displayed a unique behavior with respect to calcium content. After June, calcium overtook chloride as a dominant contributor to the amount of total dissolved solids measured within the farm hub. This is probably due to chloride returning to background concentration levels as the deicing salt applied earlier got diluted. Additional research in the coming years will be helpful to further support current claims regarding land use.

Geological Society of America Abstracts with Programs. Vol. 50, No. 2

doi: 10.1130/abs/2018NE-310959

© Copyright 2018 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.