. Southwest Montana wetland assessment : developing a statewide assessment and monitoring strategy for Montana. Wetlands; Wetland ecology; Wetland management. 200,000 - 180,000 160,000 - 140,000 - 120,000 jfl 100,000 - < 80,000 - 60,000 - 40,000 - 20,000 -. Pal u string Lacustrine Wetland System Figure 13. Proportion of mapped wetlands classified as anthropogenically altered in the southwest Montana basin-wide assessment project area. the wetland polygon. Land uses at all spatial scales were primarily agricultural. At the wetland polygon scale, cultivated cropland and irrigated lands compri
. Southwest Montana wetland assessment : developing a statewide assessment and monitoring strategy for Montana. Wetlands; Wetland ecology; Wetland management. 200,000 - 180,000 160,000 - 140,000 - 120,000 jfl 100,000 - < 80,000 - 60,000 - 40,000 - 20,000 -. Pal u string Lacustrine Wetland System Figure 13. Proportion of mapped wetlands classified as anthropogenically altered in the southwest Montana basin-wide assessment project area. the wetland polygon. Land uses at all spatial scales were primarily agricultural. At the wetland polygon scale, cultivated cropland and irrigated lands comprised about 3% of the land area. At the scale of the 1,000-m envelope, this value increased to about 9%. The density of canals decreased with increasing distance from the wetland polygon. At the scale of the wetland polygon, canal density was m/ha and decreased to m/ha at the 1,000-m scale. The density of both water rights and wells were essentially absent at all spatial scales. The mean distance of selected wetland polygons to local roads was 732 m. The mean distance of wetland polygons to canals or wells was 5,200-m and 2,100 m, respectively. The average distance of selected wetland polygons to the nearest five wetland polygons was 236 m. The average perimeter area ratio of selected palustrine wetlands was m/m2, and the average mapped polygon size was ac. Summary statistics for selected wetland polygons for the entire project area and for each individual watershed are included in Appendix H. Results of the LIM indicate anthropogenic disturbances, such as road and urban and agricultural development, were isolated mostly to valley bottoms (Figure 14). Level 2 Assessments We visited 100 wetlands during the summer of 2010. Of these, seven wetlands did not meet the criteria for further assessment, so 93 wetlands were sampled using the MTNHP EIA protocol. The majority of sampled sites (72%) were located on lands owned by the Forest Service (Figure 15). Sampled
Size: 1571px × 1589px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookleafnumber32, bookpublisherhelenamontananaturalheritageprog
