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Elizabeth Haney
Blackland Research & Extension Center, Texas A & M AgriLife, Temple, TX 76502, USA

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Technical note
Published: 15 November 2017 in Water
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Model-based water quality assessments are an important informer of conservation and environmental policy in the U.S. The recently completed national scale Conservation Effects Assessment Project (CEAP) is being replicated using an improved model populated with new and higher resolution data. National assessments are particularly difficult as models must operate with both a very large spatial extent (the contiguous U.S.) while maintaining a level of granularity required to capture important small scale processes. In this research, we developed datasets to describe the hydrologic connectivity at the U.S. Geological Survey (USGS) 12-digit Hydrologic Unit Code (HUC-12) level. Connectivity between 86,000 HUC-12s as provided by the Watershed Boundary Dataset (WBD) was evaluated and corrected. We also detailed a method to resolve the highly detailed National Hydrography Dataset (NHD) stream segments within each HUC-12 into vastly simplified representative channel schemes suitable for use in the recently developed Soil and Water Assessment Tool + (SWAT+) model. This representative channel approach strikes a balance between computational complexity and accurate representation of the hydrologic system. These data will be tested in the upcoming CEAP II national assessment. Until then, all the WBD corrections and NHDPlus representative channel data are provided via the web for other researchers to evaluate and utilize.

ACS Style

Michael J. White; Katrin Beiger; Marilyn Gambone; Elizabeth Haney; Jeff Arnold; Jungang Gao. Development of a Hydrologic Connectivity Dataset for SWAT Assessments in the US. Water 2017, 9, 892 .

AMA Style

Michael J. White, Katrin Beiger, Marilyn Gambone, Elizabeth Haney, Jeff Arnold, Jungang Gao. Development of a Hydrologic Connectivity Dataset for SWAT Assessments in the US. Water. 2017; 9 (11):892.

Chicago/Turabian Style

Michael J. White; Katrin Beiger; Marilyn Gambone; Elizabeth Haney; Jeff Arnold; Jungang Gao. 2017. "Development of a Hydrologic Connectivity Dataset for SWAT Assessments in the US." Water 9, no. 11: 892.

Journal article
Published: 17 June 2017 in Water
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Water quality simulation models such as the Soil and Water Assessment Tool (SWAT) and Agricultural Policy EXtender (APEX) are widely used in the US. These models require large amounts of spatial and tabular data to simulate the natural world. Accurate and seamless daily climatic data are critical for accurate depiction of the hydrologic cycle, yet these data are among the most difficult to obtain and process. In this paper we describe the development of a national (US) database of preprocessed climate data derived from monitoring stations applicable to USGS 12-digit watersheds. Various sources and processing methods are explored and discussed. A relatively simple method was employed to choose representative stations for each of the 83,000 12-digit watersheds in the continental US. Fully processed climate data resulting from this research were published online to facilitate other SWAT and APEX modeling efforts in the US.

ACS Style

Michael J. White; Marilyn Gambone; Elizabeth Haney; Jeffrey Arnold; Jungang Gao. Development of a Station Based Climate Database for SWAT and APEX Assessments in the US. Water 2017, 9, 437 .

AMA Style

Michael J. White, Marilyn Gambone, Elizabeth Haney, Jeffrey Arnold, Jungang Gao. Development of a Station Based Climate Database for SWAT and APEX Assessments in the US. Water. 2017; 9 (6):437.

Chicago/Turabian Style

Michael J. White; Marilyn Gambone; Elizabeth Haney; Jeffrey Arnold; Jungang Gao. 2017. "Development of a Station Based Climate Database for SWAT and APEX Assessments in the US." Water 9, no. 6: 437.