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The use of biomass crops as an energy source is frequently mentioned as an option to reduce CO 2 emissions. To evaluate the possibilities reliable yield estimates of biomass crops are required. In this paper a simple method is developed to estimate regional yields of various biomass crops, based on the linear relation between intercepted light and biomass production. The quality of the estimates was studied by using the method to estimate yields of several agricultural crops in two regions in The Netherlands. In general a deviation of less than 10 % was found between actual and estimated average yield.
The cumulative effects problem in natural resource management and land use planning stems from the difficulty of demonstrating that while each single land use change results in a negligible impact, the accumulation of these individual changes over time and within a landscape or region may constitute a major impact. This paper details a general approach to estimate the cumulative effects of land use change on wildlife habitat using Summit County, CO, USA as a case study. Our approach is based on a functional relationship between effect on habitat and distance from development. Within this building-effect distance, habitat is assumed to be degraded, producing a disturbance zone. We sum the total area within the disturbance...
INTERIOR COLUMBIA RIVER BASIN MANAGEMENT PROJECT; ADA, ADAMS, BANNOCK, BENEWAH, BINGHAM, BLAINE, BOISE, BONNER, BONNEVILLE, BOUNDARY, BUTTE, CAMAS, CANYON, CARIBOU, CASSIA, CLARK, CLEARWATER, CUSTER, ELMORE, FREMONT, GEM, GOODING, IDAHO, JEFFERSON, JEROME, KOOTENAI, LATAH, LEMHI, LEWIS, LINCOLN, MADISON, MINIDOKA, NEZ PERCE, ONEIDA, OWYHEE, PAYETTE, POWER, SHOSHONE, TETON, TWIN FALLS, VALLEY, AND WASHINGTON COUNTIES, IDAHO; DEER LODGE, FLATHEAD, GRANITE, LAKE, LEWIS AND CLARK, LINCOLN, MINERAL, MISSOULA, POWELL, RAVALLI, SANDERS, AND SILVER BOW COUNTIES, MONTANA; BAKER, CROOK, DESCHUTES, GILLIAM, GRANT, HARNEY, HOOD RIVER, JEFFERSON, KLAMATH, LAKE, MALHEUR, MORROW, SHERMAN, UMATILLA, UNION, WALLOWA, WASCO, AND WHEELER COUNTIES, OREGON; AND ADAMS, ASOTIN, BENTON, CHELAN, COLUMBIA, DOUGLAS, FERRY, FRANKLIN, GARFIELD, GRANT, KITTITAS, KLICKITAT, LINCOLN, OKANOGAN, PEND OREILLE, SPOKANE, STEVENS, WALLA WALLA, WHITMAN, AND YAKIMA COUNTIES, WASHINGTON (DRAFT SUPPLEMENT TO THE DRAFT ENVIRONME