Search Results - "Weltz, Mark A."

Assessing the performance of structure-from-motion photogrammetry and terrestrial LiDAR for reconstructing soil surface microtopography of naturally vegetated plots by Nouwakpo, Sayjro Kossi, Weltz, Mark A., McGwire, Kenneth

“…Soil microtopography is a property of critical importance in many earth surface processes but is often difficult to quantify. Advances in computer vision…”
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Rangeland hydrology and erosion model (RHEM) enhancements for applications on disturbed rangelands by Al‐Hamdan, Osama Z, Hernandez, Mariano, Pierson, Frederick B, Nearing, Mark A, Williams, C. Jason, Stone, Jeffrey J, Boll, Jan, Weltz, Mark A

“…The rangeland hydrology and erosion model (RHEM) is a new process‐based model developed by the USDA Agricultural Research Service. RHEM was initially developed…”
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Partitioning evapotranspiration in sparsely vegetated rangeland using a portable chamber by Stannard, D.I, Weltz, M.A

“…A portable chamber was used to separate evapotranspiration (ET) from a sparse, mixed-species shrub canopy in southeastern Arizona, United States, into…”
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Landscape patterns of vegetation change indicated by soil carbon isotope composition by Biedenbender, Sharon H., McClaran, Mitchel P., Quade, Jay, Weltz, Mark A.

“…Vegetation change, particularly from the grass to shrub life form, is a critical issue on the world's semiarid rangelands. Stable carbon isotope (δ 13C) values…”
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The Rangeland Hydrology and Erosion Model: A Dynamic Approach for Predicting Soil Loss on Rangelands by Hernandez, Mariano, Nearing, Mark A., Al‐Hamdan, Osama Z., Pierson, Frederick B., Armendariz, Gerardo, Weltz, Mark A., Spaeth, Kenneth E., Williams, C. Jason, Nouwakpo, Sayjro K., Goodrich, David C., Unkrich, Carl L., Nichols, Mary H., Holifield Collins, Chandra D.

“…In this study, we present the improved Rangeland Hydrology and Erosion Model (RHEM V2.3), a process‐based erosion prediction tool specific for rangeland…”
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Mapping erosion risk for saline rangelands of the Mancos Shale using the rangeland hydrology erosion model by McGwire, Kenneth C., Weltz, Mark A., Nouwakpo, Sayjro, Spaeth, Ken, Founds, Michael, Cadaret, Erik

“…This research used the rangeland hydrology and erosion model (RHEM) to map erosion risks affecting water quality of the Colorado River that originate on the…”
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Integrating precipitation, grazing, past effects and interactions in long-term vegetation change by Morris, Christo, Badik, Kevin J., Morris, Lesley R., Weltz, Mark A.

“…Determining the causes of vegetation change in arid and semi-arid environments can be difficult and may involve multiple factors, including disturbance,…”
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Vegetation, Hydrologic, and Erosion Responses of Sagebrush Steppe 9 Yr Following Mechanical Tree Removal by Williams, C. Jason, Pierson, Frederick B., Kormos, Patrick R., Al-Hamdan, Osama Z., Nouwakpo, Sayjro K., Weltz, Mark A.

“…Land managers across the western United States are faced with selecting and applying tree-removal treatments on pinyon (Pinus spp.) and juniper (Juniperus…”
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Concentrated flow erodibility for physically based erosion models: Temporal variability in disturbed and undisturbed rangelands by Al-Hamdan, Osama Z., Pierson, Frederick B., Nearing, Mark A., Williams, C. Jason, Stone, Jeffry J., Kormos, Patrick R., Boll, Jan, Weltz, Mark A.

“…Current physically based overland flow erosion models for rangeland application do not separate disturbed and undisturbed conditions in modeling concentrated…”
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A review of concentrated flow erosion processes on rangelands: Fundamental understanding and knowledge gaps by Sayjro K. Nouwakpo, Christopher J. Williams, Osama Z. Al-Hamdan, Mark A. Weltz, Fred Pierson, Mark Nearing

“…Concentrated flow erosion processes are distinguished from splash and sheetflow processes in their enhanced ability to mobilize and transport large amounts of…”
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Incorporating Hydrologic Data and Ecohydrologic Relationships into Ecological Site Descriptions by Williams, C. Jason, Pierson, Frederick B., Spaeth, Kenneth E., Brown, Joel R., Al-Hamdan, Osama Z., Weltz, Mark A., Nearing, Mark A., Herrick, Jeffrey E., Boll, Jan, Robichaud, Peter R., Goodrich, David C., Heilman, Phillip, Guertin, D. Phillip, Hernandez, Mariano, Wei, Haiyan, Hardegree, Stuart P., Strand, Eva K., Bates, Jonathan D., Metz, Loretta J., Nichols, Mary H.

“…The purpose of this paper is to recommend a framework and methodology for incorporating hydrologic data and ecohydrologic relationships in Ecological Site…”
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Near-Ground Remote Sensing of Green Area Index on the Shortgrass Prairie by Przeszlowska, Agnieszka, Trlica, Milton J., Weltz, Mark A.

“…Accurate and efficient leaf area measurements of shortgrass prairie vegetation are difficult to obtain. Few studies have considered the green area index (GAI)…”
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Fire, Plant Invasions, and Erosion Events on Western Rangelands by Pierson, Frederick B., Williams, C. Jason, Hardegree, Stuart P., Weltz, Mark A., Stone, Jeffry J., Clark, Patrick E.

“…Millions of hectares of rangeland in the western United States have been invaded by annual and woody plants that have increased the role of wildland fire…”
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Climate benchmarks and input parameters representing locations in 68 countries for a stochastic weather generator, CLIGEN by Fullhart, Andrew T, Nearing, Mark A, Armendariz, Gerardo, Weltz, Mark A

“…This dataset contains input parameters for 12 703 locations around the world to parameterize a stochastic weather generator called CLIGEN. The parameters are…”
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Slash Application Reduces Soil Erosion in Steep-Sloped Piñon-Juniper Woodlands by Noelle, Sarah M., Carr, Craig A., Stringham, Tamzen K., Weltz, Mark A.

“…Mitigating runoff and associated erosion is a fundamental challenge for sustainable management of rangelands. Hillslope runoff and erosion are strongly…”
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Insight into sediment transport processes on saline rangeland hillslopes using three‐dimensional soil microtopography changes by Nouwakpo, Sayjro K., Weltz, Mark A., McGwire, Kenneth C., Williams, Jason C., Osama, Al‐Hamdan, Green, Colleen H.M.

“…In arid and semi‐arid rangeland environments, an accurate understanding of runoff generation and sediment transport processes is key to developing effective…”
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Long‐term evidence for fire as an ecohydrologic threshold‐reversal mechanism on woodland‐encroached sagebrush shrublands by Williams, C. Jason, Pierson, Frederick B., Nouwakpo, Sayjro K., Kormos, Patrick R., Al‐Hamdan, Osama Z., Weltz, Mark A.

“…Encroachment of sagebrush (Artemisia spp.) shrublands by pinyon (Pinus spp.) and juniper (Juniperus spp.) conifers (woodland encroachment) induces a shift from…”
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Multiscale assessment of green leaf cover in a semi-arid rangeland with a small unmanned aerial vehicle by McGwire, Kenneth C., Weltz, Mark A., Finzel, Julie A., Morris, Christopher E., Fenstermaker, Lynn F., McGraw, David S.

“…Spatial variability in green leaf cover of a semi-arid rangeland was studied by comparing field measurements on 50 m crossed transects to aerial and satellite…”
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Evaluation of structure from motion for soil microtopography measurement by Nouwakpo, Sayjro K., James, Mike R., Weltz, Mark A., Huang, Chi-Hua, Chagas, Isis, Lima, Luiz

“…Recent developments in low‐cost structure‐from‐motion (SfM) technologies offer new opportunities for geoscientists to acquire high‐resolution soil…”
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Satellite Assessment of Early-Season Forecasts for Vegetation Conditions of Grazing Allotments in Nevada, United States by McGwire, Kenneth C., Weltz, Mark A., Snyder, Keirith A., Huntington, Justin L., Morton, Charles G., McEvoy, Daniel J.

“…The extent and heterogeneity of rangelands in the state of Nevada (United States) pose a challenging situation for land managers when determining stocking…”
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