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To support coordinated conservation, wetland restoration, and climate adaptation planning, we have developed five future scenarios of the Central Valley's seasonally flooded cropland and wetland waterbird habitat based on the State’s most recent climate and land use projections (Wilson et al. 2021).The USGS Western Geographic Science Center and Point Blue Conservation Science modeled a Business-as-Usual scenario plus the four scenarios developed for the Central Valley Landscape Conservation Project, which diverged along two key themes: water availability and management for conservation. Scenarios varied by climate projection (hot and wet vs. warm and dry) and management priorities (wetland restoration rate, crop...
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Cottonwood forests are in decline becasue of losses from land use conversion and reduced regeneration from river regulation. Projecting lon-term implications of current trends and policies, or alterations of these, will help to identify the importance and scale of restoration activities needed to offset losses. This project developed a landscape dynamic model to project future (eig. 25, 50, 100 year) trends in cottonwood forst area and age distribution for four remnant floodplain reches on the Missouri River, based on recent rates (or alternative scenarios) of land use change, cottonwood recruitment, and succession. For two reaches, these changes are used to project the effects onabundances of selected songbird...
Global synthesis of the findings from �140 recharge study areas in semiarid and arid regions provides important information on recharge rates, controls, and processes, which are critical for sustainable water development. Water resource evaluation, dryland salinity assessment (Australia), and radioactive waste disposal (US) are among the primary goals of many of these recharge studies. The chloride mass balance (CMB) technique is widely used to estimate recharge. Average recharge rates estimated over large areas (40?374 000 km2) range from 0�2 to 35 mm year1, representing 0�1?5% of long-term average annual precipitation. Extreme local variability in recharge, with rates up to �720 m year1, results from focussed...
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This dataset contains digitized land use/land cover (LULC) for the years 2011, 2015, and 2017. The dataset contains a 1-meter resolution raster maps for each year covering the geographic area for six watersheds within and near the Clarksburg Special Protection Area located in Montgomery County, Maryland, USA. The area includes LULC within 500-foot buffered watersheds. Watershed boundaries for Cabin Branch (CB), Crystal Rock (CR), Soper Branch (SB), Tributary 104 (T104), and Tributary 109 (T109) were derived using USGS topographic maps while Ten Mile Creek (TMC) was derived using Montgomery County, Maryland LiDAR data. LULC classes include a water class (10), impervious surface class (20), barren class (30), forest...
Opportunities to improve the ecological functioning of agricultural landscapes in the U.S. Midwest exist, and could include the restoration of native plant communities to improve biodiversity or the modification of agricultural production systems to enhance the provisioning of ecosystem services to society. To be most effective in achieving these goals, restoration efforts require knowledge of past conditions and drivers of change. We assessed landscape change in the Clear Creek, Iowa watershed from 1940 to 2002 using five metrics derived from aerial photos: land cover composition and configuration, housing density and spatial pattern, and stream sinuosity. Major cover changes in the watershed included increases...
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The goal of this project was to develop a landscape dynamics model to project future trends in forest area, age class distribution, and forest type (cottonwood vs. non-cottonwood) for four remnant floodplain segments on the Missouri River and, for two river segments, project effects of forest changes on abundances of forest bird species. These four river segments have not been channelized or inundated by reservoirs and thus still retain some of the natural abiotic and biotic processes of the Missouri River as it existed before human alteration. Fluvial geomorphic processes on all four, however, were significantly altered by the construction of six dams on the main stem of the river in the mid twentieth century....
    map background search result map search result map Projecting Long-Term Landscape Change Along the Missouri River: Implications for Cottonwood Forests and Songbird Populations Projecting Long-term Landscape Change along the Missouri River: Implications for Cottonwood Forests and Songbird Populations Report Land Use Land Cover for Selected Basins in Clarksburg, Montgomery County, MD Model Output Tabular Summaries for Central Valley Water and Land Use Futures: Land Use Change, Flooded Area, and Flooded Habitat Change Land Use Land Cover for Selected Basins in Clarksburg, Montgomery County, MD Model Output Tabular Summaries for Central Valley Water and Land Use Futures: Land Use Change, Flooded Area, and Flooded Habitat Change Projecting Long-Term Landscape Change Along the Missouri River: Implications for Cottonwood Forests and Songbird Populations Projecting Long-term Landscape Change along the Missouri River: Implications for Cottonwood Forests and Songbird Populations Report