RESEARCH: Land Use Characteristics and Water Quality: A Methodology for Valuing of Forested Buffers

Basnyat, Prakash; Teeter, L.; Lockaby, B. Graeme; Flynn, K. M.

doi:10.1007/s002670010078

Cited by 29 publications

(11 citation statements)

References 17 publications

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“…These seasons coincide with lower levels of vegetative evapotranspiration resulting in greater hydrologic connectivity between aquatic and terrestrial systems (Lockaby et al, 1993). This sampling regime has been used with success in studying relationships between water quality and land cover/use (Basnyat et al, 2000). Monthly samples and storm samples were collected throughout the remainder of the year.…”

Section: Water Collection and Analysismentioning

confidence: 99%

Changes in chemical and physical propertiesof stream water across an urban-rural gradient in western Georgia

2005

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The Middle Chattahoochee River Watershed in western Georgia is undergoing rapid urban development. Consequently, Georgia's water quality is threatened by extensive development as well as other land uses such as grazing. Maintenance of stream water quality, as land development occurs, is critical for the protection of drinking water, biotic integrity, and stream morphology. A two-phase, watershed-scale study was established to develop relationships among land use and water quality within western Georgia. During phase 1 (year one), physio-chemical, biological and morphological measurements were taken within 16 sub-watersheds, ranging in size from 500-2500 ha. Nutrient and fecal coliform concentrations within watersheds with impervious surface > 5% often exceeded those in other watersheds during both baseflow and storm flow. Also, fecal coliform bacteria in more urbanized areas often exceeded the US EPA's standard for recreational waters. During the second phase of the study, models will be tested and calibrated based on newly chosen watersheds.

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Section: Water Collection and Analysismentioning

confidence: 99%

Changes in chemical and physical propertiesof stream water across an urban-rural gradient in western Georgia

2005

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“…Flash floods can accelerate weathering of rocks and increase the quantities of sediments (and pollutants) discharged into the dams. High-intensity rainfall generally mobilizes more nutrient-laden sediment than lowintensity storm events (Basnyat et al 2000). In addition, water reservoirs are vulnerable to pollution from various human activities.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution and pollution assessment of trace metals in surface sediments of Ziqlab Reservoir, Jordan

Al-Taani

Batayneh

El-Radaideh

et al. 2015

Environ Monit Assess

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Surface sediment samples were collected from Ziqlab dam in northwestern Jordan to investigate the spatial distribution of selected trace metals and assess their pollution levels. The results showed that the concentrations of Pb, Cd, and Zn exceeded the environmental background values. Cd, Ni, and Cr contents were higher than the threshold effect level (TEL) in 63, 83, and 60 % of the reservoir sediments, respectively; whereas Pb, Zn, and Cu were less than the TEL limit. The concentrations of trace metals in reservoir sediment varied spatially, but their variations showed similar trends. Elevated levels of metals observed in the western part (adjacent to the dam wall) were coincided with higher contents of clay-silt fraction and total organic matters. Multivariate analysis indicated that Pb, Co, and Mn may be related to the lithologic component and/or the application of agrochemicals in the upstream agricultural farms. However, Cd and Zn concentrations were probably elevated due to inputs from agricultural sources, including fertilizers. Evaluation of contamination levels by the Sediment Quality Guidelines of the US-EPA, revealed that sediments were non-polluted to moderately polluted with Pb, Cu, Zn, and Cr, but non-polluted to moderately to heavily polluted with Ni and non-polluted with Mn. The geoaccumulation index showed that Ziqlab sediments were unpolluted with Pb, Cu, Zn, Ni, Cr, Co, and Mn, but unpolluted to moderately polluted with Cd. The high enrichment values for Cd and Pb (>2) indicate their anthropogenic sources, whereas the remaining elements were of natural origins consistent with their low enrichment levels.

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“…There are many NPS studies from forest land in general and undistributed forest in particular. For example, studies have included the effect of forest operation on NPS pollution (Grace 2004(Grace , 2005, simulation of the dissolved inorganic nitrogen (DIN) from forest associated with gypsy moth defoliation (Wang et al 2003), effect of forest roads on erosion losses (Grace 2002), seasonal variations (Correll et al 1999), estimation of suspended sediment quantity (Fowler and Heady 1981), NPS survey from 20 Northeastern region (Edwards and Stuart 2002), evaluation of "buffered zones" to reduce nitrate migration (Basnyat et al 2000), erosion effect (Sidle et al 2006), specific loads of various pollutants (Umemoto et al 2001), nutrient use pattern (Lodhiyal and Lodhiyal 2003), and nitrogen export to streams (Li et al 2004). …”

Section: Introductionmentioning

confidence: 99%

Nonpoint source pollution loading from an undistributed tropic forest area

Chang

Wen

Huang³

et al. 2007

Environ Monit Assess

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Water quality and unit nonpoint sources (NPS) pollution load from a forest area were studied in a mountainous watershed in Taiwan. The flow rates were measured with rectangular weirs and samples taken for water quality analysis in both non-rainy and rainy days for 2 years. The subroutine of the Hydrological Simulation Program--FORTRAN was used to simulate runoff for additional 3 years. Total annual loads of various water quality parameters were then estimated by a regression model. Most of the parameter concentrations are higher during the rainy days; their values are typically higher as compared to data from other undisturbed forest areas. Nevertheless, the concentration ratio of dissolved inorganic nitrogen to TN or PO4(3-) -P to TP shows TN or TP no correlations with the flow rates, whereas the concentrations of SS and TP are positively correlated with the flow rate. The fluctuation of annual load from this watershed is significant. For example, six major events of the entire year, for which the total duration is merely 6.4 days, contribute 42% of the annual precipitation and at least 40% of the annual NPS loads. The management for controlling the NPS pollution from this forest watershed is discussed.

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RESEARCH: Land Use Characteristics and Water Quality: A Methodology for Valuing of Forested Buffers

Cited by 29 publications

References 17 publications

Changes in chemical and physical propertiesof stream water across an urban-rural gradient in western Georgia

Changes in chemical and physical propertiesof stream water across an urban-rural gradient in western Georgia

Spatial distribution and pollution assessment of trace metals in surface sediments of Ziqlab Reservoir, Jordan

Nonpoint source pollution loading from an undistributed tropic forest area

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