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Keyword: watershed

River bar vegetation mowing response in the Middle Rio Grande

Publications Posted on: August 06, 2010
The Bureau of Reclamation routinely mows vegetation on side bars along the Rio Grande to assist with river flow management. To address the question of how such mowing affects vegetation composition and structure, three bars in the middle Rio Grande near Albuquerque, New Mexico were selected in 1994 for an experimental mowing program. Three 50-foot-wide strips on each bar were left unmowed, with the area between the strips mowed as usual.

Restoration efforts in the Rio Grande Valley State Park

Publications Posted on: August 06, 2010
Restoration techniques for riparian habitats in the Southwest are being widely studied. Efforts for natural regrowth of native species are a high priority. Techniques for native cottonwood (Populus fremontii) regeneration are being investigated in the Rio Grande Valley State Park. Experimentation with flooding of riparian zones using different techniques is beginning to show promising results.

Vegetation classification on the Middle Rio Grande

Publications Posted on: August 06, 2010
This on-going study will provide data on changes in vegetation in the Middle Rio Grande since 1984.

Establishing riparian vegetation through use of a self-cleaning siphon system

Publications Posted on: August 06, 2010
Storm water or overland flow can be captured and injected into a soil trench or infiltration gallery attached to a siphon and emplaced adjacent to a stream or arroyo bank. This injected soil water can be used by stream side vegetation for wildlife habitat, bank stabilization or other purposes. The siphon system has three hydrologically-distinct flow regimes: (1) infiltrating flow, (2) cycling outflow, and (3) constant outflow.

Effects of livestock grazing on morphology, hydrology and nutrient retention in four riparian/stream ecosystems, New Mexico, USA

Publications Posted on: August 06, 2010
Land-use practices such as livestock grazing influence the structure and function of riparian/stream ecosystems. In New Mexico, four streams were selected to determine the impact of moderate livestock grazing on morphology, solute transport, and nutrient retention. Each stream contained a reach currently exposed to grazing and an exclosed, ungrazed reach.

Trial by fire: Restoration of Middle Rio Grande upland ecosystems

Publications Posted on: August 06, 2010
The majority of upland ecosystems (desert scrub, grassland, pinyon-juniper, ponderosa pine and higher elevation conifer forests) in the Middle Rio Grande Basin were historically dependent on periodic fire to maintain their composition, productivity, and distribution. The cultural practices of European man have altered the function, structure, and composition of virtually all Middle Rio Grande Basin ecosystems.

Applications for predicting precipitation and vegetation patterns at landscape scale using lightning strike data

Publications Posted on: August 06, 2010
Previous publications discussed the results of my dissertation research on relationships between seasonality in precipitation and vegetation patterns at landscape scale. Summer precipitation at a study site in the Zuni Mountains, NM, was predicted from lightning strike and relative humidity data using multiple regression. Summer precipitation patterns were mapped using a Geographic Information System (GIS).

Analysis of change in pinon-juniper woodlands based on aerial photography, 1930's-1980's

Publications Posted on: August 06, 2010
We conducted an analysis of land cover change in selected piñon-juniper woodlands of New Mexico and Arizona, using aerial photographs from the 1930's through the 1980's. Both increases and decreases in woodland cover were observed. Fractal dimensions of woodland patches and cover-type changes were analyzed following the method of Krummel and others (1987).

Effect of spatial and temporal variablilty on water relations and growth in pinyon pine: III

Publications Posted on: August 06, 2010
This paper is the final report in a larger study of water relations in pinyon pine ecosystems. This last study looks at wholetree response to climatic variability; water use efficiency was studied using 13C measurements of tree-rings.

A constructed wet meadow model for forested lands in the Southwest

Publications Posted on: August 06, 2010
Improving primary roads in the Zuni Mountains of New Mexico must take into consideration the wet meadows and upland areas. This study looks at spring flow rates, erosion, channels and changes in plant cover and composition. The goal is to help planners design environmentally sensitive roadways for wet meadow areas.

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