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You searched for: Journal name Transactions of the ASAE Remove constraint Journal name: Transactions of the ASAE Subject water pollution Remove constraint Subject: water pollution
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1. Application of APEX for forestry

Author:
Saleh, A.; Williams, J.R.; Wood, J.C.; Hauck, L.M.; Blackburn, W.H.
Source:
Transactions of the ASAE 2004 v.47 no.3 pp. 751-765
ISSN:
0001-2351
Subject:
sediment yield; phosphorus; silvicultural practices; pollution control; forested watersheds; nitrate nitrogen; losses from soil; phosphates; runoff; water pollution; simulation models; best management practices; erosion control; nonpoint source pollution; filter strips; forest roads; organophosphorus compounds; site preparation; environmental models; forest litter; organic nitrogen compounds; computer analysis; water erosion; Texas
Abstract:
... This study was conducted to determine if the Agricultural Policy/Environmental Extender (APEX) model could reasonably replicate the effects of silvicultural practices on streamflow and loading of sediments and nutrients. APEX was modified to enhance factors associated with forestry conditions such as rainfall interception by canopy, litter, subsurface flow, nutrient movement, and routing enrichmen ...
Handle:
10113/9677

2. Coupling mixing zone concept with convection-diffusion equation to predict chemical transfer to surface runoff

Author:
Zhang, X.C.; Norton, L.D.; Lei, T.; Nearing, M.A.
Source:
Transactions of the ASAE 1999 v.42 no.4 pp. 987-994
ISSN:
0001-2351
Subject:
runoff; water quality; water pollution; equations; nonpoint source pollution; solutes
Abstract:
... Modeling chemical transfer from soil solution to surface runoff is essential for developing a surface water quality model that can be used to assess pollution potentials of agricultural chemicals. Chemical transfer to runoff can be modeled as a two-rate process. A fast rate subprocess, which prevails at early stages of rainfall, causes an exponential depletion of chemicals from the mixing zone. A ...
Handle:
10113/6614

3. DRAINWAT-based methods for estimating nitrogen transport in poorly drained watersheds

Author:
Amatya, D.M.; Chescheir, G.M.; Fernandez, G.P.; Skaggs, R.W.; Gilliam, J.W.
Source:
Transactions of the ASAE 2004 v.47 no.3 pp. 677-687
ISSN:
0001-2351
Subject:
water pollution; simulation models; nitrogen; forested watersheds; streams; losses from soil; watershed hydrology; poorly drained soils; forest soils; hydrologic models; hydrochemistry; soil water movement; North Carolina
Abstract:
... Methods are needed to quantify effects of land use and management practices on nutrient and sediment loads at the watershed scale. Two methods were used to apply a DRAINMOD-based watershed-scale model (DRAINWAT) to estimate total nitrogen (N) transport from a poorly drained, forested watershed. In both methods, in-stream retention or losses of N were calculated with a lumped-parameter model, which ...

4. Development and testing of watershed-scale models for poorly drained soils

Author:
Fernandez, G.P.; Chescheir, G.M.; Skaggs, R.W.; Amatya, D.M.
Source:
Transactions of the ASAE 2005 v.48 no.2 pp. 639-652
ISSN:
0001-2351
Subject:
water pollution; simulation models; water quality; forested watersheds; nitrate nitrogen; streams; coastal plain soils; poorly drained soils; pollution load; subsurface drainage; hydrologic models; North Carolina
Abstract:
... Two watershed-scale hydrology and water quality models were used to evaluate the cumulative impacts of land use and management practices on downstream hydrology and nitrogen loading of poorly drained watersheds. Field-scale hydrology and nutrient dynamics are predicted by DRAINMOD in both models. In the first model (DRAINMOD-DUFLOW), field-scale predictions are coupled to the canal/stream routing ...
Handle:
10113/37520

5. Effects of Laying Hen Manure Application Rate on Water Quality

Author:
Chinkuyu, A.J.; Kanwar, R.S.; Lorimor, J.C.; Xin, H.; Bailey, T.B.
Source:
Transactions of the ASAE 2002 v.45 no.2 pp. 299-308
ISSN:
0001-2351
Subject:
agricultural land; ammonium nitrate; animal manures; corn; crop yield; fertilizer rates; fertilizers; groundwater; laying hens; lysimeters; manure spreading; nitrate nitrogen; nitrogen; orthophosphates; runoff; surface quality; urea ammonium nitrate; water pollution; water quality
Abstract:
... Excessive use of animal manure on agricultural lands can impact the quality of surface and groundwater resources. A three-year study (1998-2000) was conducted on nine 0.4-ha plots and on six 2.1-m 2 lysimeters to investigate the effect of two nitrogen (N) application rates from laying hen manure and one N application rate from urea ammonium nitrate (UAN) fertilizer on surface and groundwater quali ...
DOI:
10.13031/2013.8524

6. Evaluation of AnnAGNPS on Mississippi Delta MSEA watersheds

Author:
Yuan, Y.; Bingner, R.L.; Rebich, R.A.
Source:
Transactions of the ASAE 2001 v.44 no.5 pp. 1183-1190
ISSN:
0001-2351
Subject:
watersheds; crop production; crop management; cover crops; winter; pollution control; water pollution; erosion control; water erosion; sediment yield; simulation models; agricultural land; losses from soil; runoff; prediction; best management practices; nonpoint source pollution; Mississippi
Abstract:
... Sediment and its associated pollutants entering a water body can be very destructive to the health of that system. Best Management Practices (BMPs) can be used to reduce these pollutants, but understanding the most effective practices is very difficult. Watershed models are the most cost-effective tools to aid in the decision-making process of selecting the BMP that is most effective in reducing t ...
Handle:
10113/26652

7. Evaluation of percent flow captured by a small in-field runoff collector

Author:
Franklin, D.H.; Cabrera, M.L.; Steiner, J.L.; Endale, D.M.; Miller, W.P.
Source:
Transactions of the ASAE 2001 v.44 no.3 pp. 551-554
ISSN:
0001-2351
Subject:
runoff; surface water; land management; water quality; water pollution; pollution load; nutrient management
Abstract:
... Increased environmental concern about nutrient loadings in runoff and surface water has heightened the need for evaluation of management practices at the field scale. Thus, there is a need for small in-field runoff collectors to assess nutrient migration at the field scale on various land management systems. A runoff sampler previously designed for the relatively flat terrain of the Coastal Plain ...
Handle:
10113/13353

8. Farm-level optimization of BMP placement for cost-effective pollution reduction

Author:
Gitau, M.W.; Veith, T.L.; Gburek, W.J.
Source:
Transactions of the ASAE 2004 v.47 no.6 pp. 1923-1931
ISSN:
0001-2351
Subject:
best management practices; Soil and Water Assessment Tool model; nonpoint source pollution; algorithms; pollution control; agricultural runoff; pollutants; agricultural land; agricultural watersheds; phosphorus; phosphorus fertilizers; water pollution; fertilizer application; New York
Abstract:
... With best management practices (BMPs) being used increasingly to control agricultural pollutant losses to surface waters, establishing the environmental effectiveness of these practices has become important. Additionally, cost implications of establishing and maintaining environmentally effective BMPs are often a crucial factor in selecting and adopting BMPs. This article considers both water qual ...
Handle:
10113/9729

9. Fenamiphos losses under simulated rainfall: plot size effects

Author:
Wauchope, R.D.; Truman, C.C.; Johnson, A.W.; Sumner, H.R.; Hook, J.E.; Dowler, C.C.; Chandler, L.D.; Gascho, G.J.; Davis, J.G.
Source:
Transactions of the ASAE 2004 v.47 no.3 pp. 669-676
ISSN:
0001-2351
Subject:
fenamiphos; pesticide residues; metabolites; losses from soil; agricultural runoff; rain; agricultural soils; sandy soils; field experimentation; experimental design; soil pollution; water pollution; loamy sand soils; Georgia
Abstract:
... The purpose of this study was to compare two commonly used runoff experimental methods, which have different scales, on measurements of runoff and associated fenamiphos and metabolite losses over a 2-year period. Methods used were 15 m wide by 43 m long (645 m2) mesoplots and 1.8 m wide by 3 m long (5.4 m2) microplots, under simulated rainfall (25 mm h-1 for 2 h) at 1, 14, and 28 d after fenamipho ...
Handle:
10113/9676

10. Impact of swine waste application on ground and stream water quality in an eastern Coastal Plain watershed

Author:
Stone, K.C.; Hunt, P.G.; Humenik, F.J.; Johnson, M.H.
Source:
Transactions of the ASAE 1998 v.41 no.6 pp. 1665-1670
ISSN:
0001-2351
Subject:
environmental impact; nitrate nitrogen; water quality; water pollution; watersheds; pig manure
Abstract:
... Nonpoint source pollution from agriculture has been a major concern, particularly where intensive agricultural operations exist near environmentally sensitive waters. To address these concerns, a water quality project was initiated in Duplin County, North Carolina, in the 2044-ha Herrings Marsh Run watershed. A swine farm within this monitored watershed expanded its operation from 3,300 to more th ...
Handle:
10113/18070

11. Leaching and sorption of nitrogen and phosphorus by crop residue

Author:
Cermak, J.D.; Gilley, J.E.; Eghball, B.; Wienhold, B.J.
Source:
Transactions of the ASAE 2004 v.47 no.1 pp. 113-118
ISSN:
0001-2351
Subject:
soil nutrient balance; phosphorus; ammonium nitrogen; pollution control; nitrate nitrogen; losses from soil; phosphates; Triticum aestivum; water pollution; Zea mays; Glycine max; sorption; agricultural runoff; wheat straw; leaching; corn; nonpoint source pollution; winter wheat; nitrogen; soybeans
Abstract:
... Overland flow from cropland areas often contains nutrients and residue materials can either contribute to runoff nutrient load through leaching or remove nutrients by sorption. Measurements were made of leaching and sorption of nitrogen and phosphorus from corn (Zea mays L.), soybean (Glycine max (L.) Merr.) and winter wheat (Triticum aestivum L. cv. Pastiche) residues placed in solutions containi ...
Handle:
10113/8028

12. Modeling long-term water quality impact of structural BMPs

Author:
Bracmort, K.S.; Arabi, M.; Frankenberger, J.R.; Engel, B.A.; Arnold, J.G.
Source:
Transactions of the ASAE 2006 v.49 no.2 pp. 367-374
ISSN:
0001-2351
Subject:
best management practices; pollution control; nonpoint source pollution; soil nutrients; water erosion; erosion control; phosphorus; sediment yield; Soil and Water Assessment Tool model; long term experiments; water quality; water pollution; streams; agricultural runoff; Indiana
Abstract:
... Structural best management practices (BMPs) that reduce soil erosion and nutrient losses have been recommended and installed on agricultural land for years. A structural BMP is expected to be fully functional only for a limited period after installation, after which degradation of the BMP is likely to lead to a reduction in the water quality improvement provided by the BMP. Assessing the impact of ...
Handle:
10113/1347

13. Phosphate equilibrium between stream sediments and water: potential effect of chemical amendments

Author:
Haggard, B.E.; Ekka, S.A.; Matlock, M.D.; Chaubey, I.
Source:
Transactions of the ASAE 2004 v.47 no.4 pp. 1113-1118
ISSN:
0001-2351
Subject:
phosphates; hydrochemistry; streams; sediments; water pollution; sediment contamination; sewage effluent; wastewater treatment; calcium carbonate; alum; aluminum sulfate; phosphorus; pollution control; Arkansas
Abstract:
... Sediments often play an important role in the temporary storage and release of phosphorus (P) in streams, especially streams receiving municipal wastewater treatment plant (WWTP) effluent. The objective of this study was to evaluate sediment-aqueous phase P equilibrium in four Ozark streams, and to determine the effect of alum (Al2(SO4)3) and calcium carbonate (CaCO3) on stream sediment-P interact ...
Handle:
10113/9707

14. Seasonal changes in flow and nitrate-N loss from subsurface drains

Author:
Bjorneberg, D.L.; Kanwar, R.S.; Melvin, S.W.
Source:
Transactions of the ASAE 1996 v.39 no.3 pp. 961-967
ISSN:
0001-2351
Subject:
loam soils; Zea mays; Glycine max; nitrate nitrogen; losses from soil; tillage; subsurface drainage; crop rotation; continuous cropping; denitrification; drainage water; water quality; seasonal variation; rain; water pollution; crop yield; preferential flow; Iowa
Abstract:
... Subsurface drainage from thirty-six, 0.4-ha plots was monitored for three years (1990 to 1992) from chisel plow, moldboard plow, ridge till, and no-till systems with continuous corn and corn-soybean rotations. Data were analyzed in four seasonal stages to determine variations in drain flows and nitrate-N contents in drain effluent. The hypothesis of this study was that differences among tillage sy ...
Handle:
10113/14444

15. Seasonal occurrence and export of five herbicides from a North Carolina Coastal Plain watershed

Author:
Novak, J.M.; Watts, D.W.; Stone, K.C.; Johnson, M.H.
Source:
Transactions of the ASAE 2001 v.44 no.5 pp. 1201-1206
ISSN:
0001-2351
Subject:
water pollution; atrazine; cyanazine; agricultural land; herbicide residues; watersheds; losses from soil; streams; seasonal variation; metolachlor; alachlor; ametryn; coastal plains; North Carolina
Abstract:
... Herbicide detection in surface water sources has caused concern about contamination of these sources and adverse effects on human and aquatic health. Understanding surface water herbicide transport from agriculturally intensive watersheds is useful for development of herbicide best management practices to reduce off-site movement. The seasonal occurrence and load of five herbicides exported by a s ...
Handle:
10113/18427

16. Simulating water quality improvements in the Upper North Bosque River watershed due to phosphorus export through turfgrass sod

Author:
Stewart, G.R.; Munster, C.L.; Vietor, D.M.; Arnold, J.G.; McFarland, A.M.S.; White, R.; Provin, T.
Source:
Transactions of the ASAE 2006 v.49 no.2 pp. 357-366
ISSN:
0001-2351
Subject:
water pollution; sediment yield; harvesting; water quality; sod strips; nitrogen; cattle manure; best management practices; erosion control; nonpoint source pollution; filter strips; Soil and Water Assessment Tool model; turf grasses; phosphorus; agricultural watersheds; Texas
Abstract:
... The Upper North Bosque River (UNBR) watershed is under a total maximum daily load (TMDL) mandate to reduce loading of soluble phosphorus (P) in impaired river segments. To address these problems, Texas A&M University researchers have developed a Best Management Practice (BMP) that removes excess nutrients from impaired watersheds through turfgrass sod. Harvest of manure-grown sod removes a thin la ...
Handle:
10113/1346

17. Stream nutrient retention in three northeastern Oklahoma agricultural catchments

Author:
Haggard, B.E.; Storm, D.E.; Tejral, R.D.; Popova, Y.A.; Keyworth, V.G.; Stanley, E.H.
Source:
Transactions of the ASAE 2001 v.44 no.3 pp. 597-605
ISSN:
0001-2351
Subject:
streams; water quality; watersheds; watershed hydrology; spatial variation; nutrient retention; seasonal variation; limnology; water pollution; aquatic environment; Oklahoma
Abstract:
... Stream nutrient retention was examined in three adjacent agricultural catchments (Cherokee Creek, Cloud Creek, and Dry Creek) in the Ozark Plateau. Retention efficiency was measured using short-term nutrient and tracer injections to estimate nutrient uptake length (S(w)) during summer 1999 and winter 2000. A one-dimensional transport model was used to estimate dispersion, transient storage size, a ...
Handle:
10113/26651

18. Transport comparison of technical grade and starch-encapsulated atrazine

Author:
Gish, T.J.; Schoppet, M.J.; Helling, C.S.; Shirmohammadi, A.; Schreiber, M.M.; Wing, R.E.
Source:
Transactions of the ASAE 1991 v.34 no.4 pp. 1738-1744
ISSN:
0001-2351
Subject:
atrazine; encapsulation; groundwater; leaching; starch; microirrigation; water pollution
Abstract:
... The feasibility of using starch-encapsulated atrazine to minimize convective transport under conditions favoring preferential flow was evaluated. Forty small, undisturbed, soil columns (45 cm2 X 3 cm) were removed from an established no-tillage management site and randomly grouped into one of five atrazine treatments: 1) technical grade; 2) borate process, starch-encapsulated; 3) jet-cooked, pearl ...
Handle:
10113/24432

19. Uncertainty in measured sediment and nutrient flux in runoff from small agricultural watersheds

Author:
Harmel, R.D.; King, K.W.
Source:
Transactions of the ASAE 2005 v.48 no.5 pp. 1713-1721
ISSN:
0001-2351
Subject:
agricultural watersheds; agricultural runoff; sediment yield; losses from soil; nitrate nitrogen; phosphates; nitrates; nonpoint source pollution; water pollution; measurement; water quality; sampling; storms; Texas
Abstract:
... Storm water quality sampling techniques vary considerably in the resources required for sample collection and analysis, and potentially in the resulting constituent flux estimates. However, quantitative information on sampling error is rarely available for use in selecting appropriate sampling techniques and for evaluating the effects of various techniques on measured results. In an effort to quan ...
Handle:
10113/5523

20. Water quality at the Buffalo National River, Arkansas, 1991-2001

Author:
White, K.L.; Haggard, B.E.; Chaubey, I.
Source:
Transactions of the ASAE 2004 v.47 no.2 pp. 407-417
ISSN:
0001-2351
Subject:
rivers; water pollution; nonpoint source pollution; stream flow; runoff; water quality; pollution load; nutrients; nitrogen; phosphorus; coliform bacteria; Escherichia coli; Streptococcus; sediment yield; longitudinal studies; Arkansas
Abstract:
... The Buffalo National River (BNR) is a relatively unpolluted, free-flowing river with riffle-pool geomorphology, located in north-central Arkansas. The specific objectives of this study were to: (1) evaluate differences between physicochemical properties and concentrations in water quality samples representing base flow and surface runoff conditions, (2) determine trends in physicochemical properti ...
Handle:
10113/9686