Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed

Polyakov, Viktor O.; Fares, Ali; Kubo, D.; Jacobi, James D.; Smith, C. Edwin

doi:10.1016/j.envsoft.2006.12.001

Cited by 76 publications

(48 citation statements)

References 27 publications

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“…The AnnAGNPS model was also successfully validated for simulating sediment and nutrient loads in Georgia (Suttles et al 2003), Ohio (Bingner et al 2006), Canada (Leon et al 2005), and sediment in Sicily (Licciardello et al 2007). Application of AnnAGNPS to the Hanalei watershed in Hawaii showed that landslide processes were significant contributors to sediment yield and need to be incorporated into the model (Polyakov et al 2007). Overall, the model validation analysis shows that both SWAT and AnnAGNPS are valuable tools for analyzing the impact of conservation practices on environmental quality.…”

Section: Journal Of Soil and Water Conservationmentioning

confidence: 99%

“…Additionally, the application of AnnAGNPS in Ohio showed that the use of controlled drainage can be effective in reducing N loadings. A simulation of the Hanalei watershed in Hawaii (Polyakov et al 2007) showed that, while sheet and rill components were considered by AnnAGNPS, landslide processes were significant contributors to sediment in the watershed, demonstrating the need for additional research to incorporate these processes into watershed models. The ability to account for all sources of sediment and chemicals in watershed models will reduce the uncertainty in using model simulations for estimating the effects of conservation practices.…”

Section: Journal Of Soil and Water Conservationmentioning

confidence: 99%

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The Conservation Effects Assessment Project benchmark watersheds: Synthesis of preliminary findings

Richardson¹,

Bucks²,

Sadler³

2008

Journal of Soil and Water Conservation

100

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The USDA has provided technical assistance and cost sharing to farmers and ranchers for implementing conservation practices on privately owned working lands since the 1930s. The primary purpose of the assistance programs has been to "improve the productivity of US farms and ranches and to protect the 'natural resource base' that sustained the agricultural enterprise" (Cox 2006). Conservationists have recognized for many years that these conservation programs protect millions of acres of farm and ranch lands from degradation. Research over the past fifty Abstract: The Conservation Effects Assessment Project was established to quantify the environmental impacts of USDA conservation programs. The Conservation Effects Assessment Project involves multiple watershed assessment studies designed to provide a scientific basis for a national assessment. The USDA Agricultural Research Service established 14 research sites-benchmark watersheds-to measure regionally specific environmental quality effects of conservation practices and to improve and validate models used by the USDA Natural Resources Conservation Service for their national assessment. Within each watershed, data were collected and continue to be collected to provide insight into the effects of specific conservation practices implemented under programs such as the Environmental Quality Incentives Program and the Conservation Reserve Program. A data storage and management system, Sustaining the Earth's Watersheds-Agricultural Research Data System (STEWARDS), was developed to provide easy accessibility to these data for analysis. Models were validated using data from many of the watersheds and were shown to be valuable tools for extrapolating the results for a national assessment. The physical process models were also combined with economic models to optimize tradeoffs among environmental and economic objectives of conservation practices. The benchmark watershed studies have begun to identify the effects of selected conservation practices, although additional data are required to provide definitive results. A prototype of a new modular modeling system has been developed that will provide a more powerful tool for future analyses. The initial Conservation Effects Assessment Project findings and products demonstrate progress toward the overall goals of quantifying conservation practice effects and providing tools to transfer the knowledge to points where they are applied under future conservation policy.

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Section: Journal Of Soil and Water Conservationmentioning

confidence: 99%

Section: Journal Of Soil and Water Conservationmentioning

confidence: 99%

The Conservation Effects Assessment Project benchmark watersheds: Synthesis of preliminary findings

Richardson¹,

Bucks²,

Sadler³

2008

Journal of Soil and Water Conservation

100

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“…The AnnAGNPS model Yuan, 2003) has been evaluated for hydrology simulations and water quality prediction worldwide under different land uses and climate conditions (Baginska;Milne-Home;Cornish, 2003;Chahor et al, 2014;Li et al, 2015;Li, 2012;Hua et al, 2012;Licciardello et al, 2007;Parajuli et al, 2009;Polyakov et al, 2007;Shamshad et al, 2008;Shrestha et al, 2006;Taguas et al, 2012;Yuan et al, 2011;Rebich, 2001). Li et al (2015) In tropical conditions, Shamshad et al (2008) applied the AnnAGNPS model for soil loss estimation and nutrient loading for watersheds in Malaysia.…”

Section: Annualized Agricultural Non-point Source (Annagnps)mentioning

confidence: 99%

Agricultural watershed modeling: a review for hydrology and soil erosion processes

et al. 2016

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Models have been used by man for thousands of years to control his environment in a favorable way to better human living conditions. The use of hydrologic models has been a widely effective tool in order to support decision makers dealing with watersheds related to several economic and social activities, like public water supply, energy generation, and water availability for agriculture, among others. The purpose of this review is to briefly discuss some models on soil and water movement on landscapes (RUSLE, WEPP, GeoWEPP, LASH, DHSVM and AnnAGNPS) to provide information about them to help and serve in a proper manner in order to discuss particular problems related to hydrology and soil erosion processes. Models have been changed and evaluated significantly in recent years, highlighting the use of remote sense, GIS and automatic calibration process, allowing them capable of simulating watersheds under a given land-use and climate change effects. However, hydrology models have almost the same physical structure, which is not enough for simulating problems related to the long-term effects of different land-uses. That has been our challenge for next future: to understand entirely the hydrology cycle, having as reference the critical zone, in which the hydrological processes act together from canopy to the bottom of aquifers.Index terms: RUSLE; WEPP; GeoWEPP; LASH; DHSVM; AnnAGNPS. RESUMOModelos têm sido usados pelo homem há milhares de anos para controlar seu ambiente de uma maneira favorável para melhores condições de vida para os humanos. O uso de modelos hidrológicos tem sido uma ferramenta muito eficaz para apoiar os decisores que lidam com as bacias hidrográficas para subsidiar diversas atividades econômicas e sociais, como o abastecimento público de água, geração de energia, e a disponibilidade de água para a agricultura, entre outros. Objetivou-se, nesta revisão, discutir brevemente alguns modelos muito aplicados ao estudo do movimento da água e solos em paisagens (RUSLE, WEPP, GeoWEPP, LASH, DHSVM and AnnAGNPS), para fornecer informações sobre os mesmos, para auxiliar no entendimento adequado de problemas específicos relacionados com os processos de hidrologia e erosão do solo. Modelos têm sido alterados e avaliados de forma significativa nos últimos anos, com destaque para o uso de sensoriamento remoto, GIS e processo de calibração automática, permitindo aos mesmos que sejam capazes de simular bacias hidrográficas nas suas condições atuais de uso do solo e mudanças climáticas. No entanto, os modelos hidrológicos têm quase a mesma estrutura física, o que não é suficiente para simular problemas relacionados com os efeitos a longo prazo de diferentes usos do solo. Esse tem sido um dos principais desafios para o futuro: compreender inteiramente o ciclo hidrológico, tendo como referência a zona crítica, na qual os processos hidrológicos agem em conjunto a partir do dossel até a base dos aquíferos.

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“…Water quality data are particularly sparse in the case of organic nutrient concentrations and nutrient and sediment fluxes, both of which are important in ecosystem dynamics and watershed management. Statistical and conceptual models are tools that may allow us to make the necessary estimates; application of such models to Hawaiian watersheds is under development (Polyakov et al 2007, Gaut 2009, Okano 2009.…”

Section: Stream Nutrient Concentrations On the Windward Coast Of Hawamentioning

confidence: 99%

Stream Nutrient Concentrations on the Windward Coast of Hawai‘i Island and Their Relationship to Watershed Characteristics

Michaud

Wiegner

2011

Pacific Science

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Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed

Cited by 76 publications

References 27 publications

The Conservation Effects Assessment Project benchmark watersheds: Synthesis of preliminary findings

The Conservation Effects Assessment Project benchmark watersheds: Synthesis of preliminary findings

Agricultural watershed modeling: a review for hydrology and soil erosion processes

Stream Nutrient Concentrations on the Windward Coast of Hawai‘i Island and Their Relationship to Watershed Characteristics

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