caa a22 4500 467904472 CHVBK 20180406152829.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s10661-006-1679-z doi (NATIONALLICENCE)springer-10.1007/s10661-006-1679-z Using NDVI to Assess Vegetative Land Cover Change in Central Puget Sound [Elektronische Daten] [Dana Morawitz, Tina Blewett, Alex Cohen, Marina Alberti] We used the Normalized Difference Vegetation Index (NDVI) in the rapidly growing Puget Sound region over three 5-year time blocks between 1986-1999 at three spatial scales in 42 Watershed Administrative Units (WAUs) to assess changes in the amounts and patterns of green vegetation. On average, approximately 20% of the area in each WAU experienced significant NDVI change over each 5-year time block. Cumulative NDVI change over 15 years (summing change over each 5-year time block) was an average of approximately 60% of each WAU, but was as high as 100% in some. At the regional scale, seasonal weather patterns and green-up from logging were the primary drivers of observed increases in NDVI values. At the WAU scale, anthropogenic factors were important drivers of both positive and negative NDVI change. For example, population density was highly correlated with negative NDVI change over 15 years (r = 0.66, P < 0.01), as was road density (r = 0.71, P < 0.01). At the smallest scale (within 3 case study WAUs) land use differences such as preserving versus harvesting forest lands drove vegetation change. We conclude that large areas within most watersheds are continually and heavily impacted by the high levels of human use and development over short time periods. Our results indicate that varying patterns and processes can be detected at multiple scales using changes in NDVIa values. Springer Science + Business Media, Inc., 2006 change detection nationallicence land cover nationallicence NDVI nationallicence population growth nationallicence Seattle nationallicence Washington nationallicence urban ecology nationallicence urbanization nationallicence vegetation nationallicence watershed administrative unit nationallicence Morawitz Dana Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut Blewett Tina Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut Cohen Alex Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut Alberti Marina Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 85-106 0167-6369 114:1-3<85 2006 114 10661 https://doi.org/10.1007/s10661-006-1679-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-1679-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Morawitz Dana Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut NATIONALLICENCE 700 1- Blewett Tina Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut NATIONALLICENCE 700 1- Cohen Alex Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut NATIONALLICENCE 700 1- Alberti Marina Department of Urban Design and Planning, University of Washington, Seattle, Washington, USA aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 85-106 0167-6369 114:1-3<85 2006 114 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer