EFFECT OF BMP IMPLEMENTATION ON STORM FLOW QUALITY OF 2 NORTHWESTERN ARKANSAS STREAMS

Citation
Dr. Edwards et al., EFFECT OF BMP IMPLEMENTATION ON STORM FLOW QUALITY OF 2 NORTHWESTERN ARKANSAS STREAMS, Transactions of the ASAE, 40(5), 1997, pp. 1311-1319
Citations number
25
Categorie Soggetti
Engineering,Agriculture,"Agriculture Soil Science
Journal title
ISSN journal
00012351
Volume
40
Issue
5
Year of publication
1997
Pages
1311 - 1319
Database
ISI
SICI code
0001-2351(1997)40:5<1311:EOBIOS>2.0.ZU;2-5
Abstract
The effectiveness of management practices in improving quality of runo ff from agricultural land areas has been reported based primarily on r esults from plot-and field-scale studies. There is limited information available on watershed scales, particularly when the dominant agricul tural land use is pasture. The objective of this study was to determin e whether a program of Best Management Practice (BMP) implementation i n the Lincoln Lake watershed of northwestern Arkansas was effective in reducing storm streamflow concentrations and mass transport of nitrat e nitrogen (NO3-N), ammonia nitrogen (NH3-N), total Kjeldahl nitrogen (TKN), ortho-phosphorus (PO4-P), total phosphorus (TP), chemical oxyge n demand (COD), and total suspended solids (TSS). Storm flow quality o f the two main tributaries to Lincoln Lake was monitored from Septembe r 1991 to April 1994. Significant decreases (from 23 to 75% per year) in both concentrations and mass transport of NO3-N, NH3-N, TKN, and CO D occurred concurrently with BMP implementation. The decreases in nitr ogen and COD concentrations and mass transport are attributed to BMP i mplementation, and the BMP most responsible for these decreases is mos t likely nutrient management.