Comprehensive nonpoint source pollution models for a free-range chicken farm in a rural watershed in Taiwan

Lee, Chih Sheng; Chang, Chia-Hsuin; Wen, Ching Gung; Chang, Shui Ping

doi:10.1016/j.agee.2010.06.013

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…The water quality sampling station (Station 1) and the water inlet/outlet of HSR are located in segments 1 and 3, respectively. The quantity and quality of direct flows were estimated by the amount of precipitation and rainwater quality observed in the Keelung City, and the event mean concentrations of runoff from different land use areas in Taiwan [37,38]. Note that the catchment runoff was obtained from the water balance of observed water level, recharged flow, evaporation, outflow and precipitation.…”

Section: Ce-qual-w2 Modelmentioning

confidence: 99%

Assessment of the Impacts of Climate Change on the Water Quality of a Small Deep Reservoir in a Humid-Subtropical Climatic Region

Chang

Cai

Lin

et al. 2015

Water

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Surface water quality has been identified as potentially vulnerable to climate change. This study assesses the impacts of climate change on the water quality of Hsinshan Reservoir, Taiwan, through CE-QUAL-W2 simulations. The model parameters were calibrated by field data collected during [2004][2005][2006][2007][2008], and verified against observations made during 2009-2012. The projected temperature and precipitation data for the near-and long-term future were downscaled to regional and daily scales, and used to simulate the projected changes in water quality through the validated model. The simulation results were reported as probability-based cumulative distribution functions to access the impacts of climate change on water quality. The results indicated that the intensified thermal stratification caused by the rising temperature is the primary driver of water quality decline, which increases the probability of deep-layer oxygen depletion and the flux of limiting nutrients for algae growth, resulting in a higher risk of algal blooms and eutrophication. The adaptation strategies of multilevel-intake operations and increasing bottom-layer dissolved oxygen without destratification are recommended. OPEN ACCESSWater 2015, 7 1688

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Section: Ce-qual-w2 Modelmentioning

confidence: 99%

Assessment of the Impacts of Climate Change on the Water Quality of a Small Deep Reservoir in a Humid-Subtropical Climatic Region

Chang

Cai

Lin

et al. 2015

Water

Self Cite

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“…Several similar studies in the literature report different results with great variability. For example, while Jones et al [24] found no change in nitrate and phosphate concentrations in groundwater associated with the expansion of an open-air livestock farm in the United Kingdom, Lee et al [25] concluded that soil-concentrated nutrient zones in poultry farming areas are highly likely to cause environmental problems through leaching and runoff. Similarly, Kratz et al [8] reported "excessive" concentrations of mineral nitrogen and available phosphorus in the soils of poultry farming areas in Europe and hypothesized environmental risks associated with nutrient volatilization, leaching and runoff.…”

Section: Discussionmentioning

confidence: 99%

Soil Organic Matter and Nutrient Levels in Outdoor Runs in Organic Laying Farms

Zoli

Mantovi

Ferrari

et al. 2023

Animals

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To evaluate the nutrient load due to the grazing of laying hens in outdoor runs, monitoring of soil characteristics was conducted in three Italian organic farms. For each farm, soil samples were taken from three increasing distances from the hen house and two depths, and different chemical parameters were evaluated. The comparison among the results from the different distances shows that N-NO3 and Olsen P are the most affected parameters by hen feces: both present high values with a statistically significant difference in the area close to the poultry house and for the most superficial layer. Even TKN and TOC show significant differences between the concentrations of the first layer (more concentrated) and those of the second layer (less concentrated). In general, the surface soil layer closest to the chicken house is the portion of the outdoor run most affected by chicken droppings and represents the most critical point in terms of potential environmental impact. Therefore, it is necessary to intensify the management of the outdoor run with tools that can facilitate the grazing of animals and with vegetation that can absorb nutrients by limiting leaching and runoff.

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Section: Discussionmentioning

confidence: 99%

Soil Organic Matter and Nutrient Levels in Outdoor Runs in Organic Laying Farms

Zoli¹,

Mantovi²,

Ferrari³

et al. 2022

Preprint

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To evaluate the nutrient load due to the grazing of laying hens in outdoor runs, soil characteristics were monitored in three Italian organic farms. For each farm, soil samples were taken from three increasing distances from the hen house and two depths and different chemical parameters were evaluated. The comparison among the results from the different distances shows that N-NO3 and Olsen P are the most affected parameters by hen faeces: both present high values with a statistically significant difference in the area close to the poultry house and for the most superficial layer. Even TKN and TOC show significant differences between the concentrations of the first layer (more concentrated) and those of the second layer (less concentrated). In general, the surface soil layer closest to the chicken house is the portion of the outdoor run most affected by chicken droppings and represents the most critical point in terms of potential environmental impact. Therefore, it is necessary to intensify the management of the outdoor run with tools that can facilitate the grazing of animals and with vegetation that can absorb nutrients by limiting leaching and run-off.

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Comprehensive nonpoint source pollution models for a free-range chicken farm in a rural watershed in Taiwan

Cited by 10 publications

References 22 publications

Assessment of the Impacts of Climate Change on the Water Quality of a Small Deep Reservoir in a Humid-Subtropical Climatic Region

Assessment of the Impacts of Climate Change on the Water Quality of a Small Deep Reservoir in a Humid-Subtropical Climatic Region

Soil Organic Matter and Nutrient Levels in Outdoor Runs in Organic Laying Farms

Soil Organic Matter and Nutrient Levels in Outdoor Runs in Organic Laying Farms

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