کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4399277 1306727 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mapping Chlorophyll-a Concentrations in West Lake, China using Landsat 7 ETM+
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Mapping Chlorophyll-a Concentrations in West Lake, China using Landsat 7 ETM+
چکیده انگلیسی

Eutrophication is a persistent problem that affects the ecological health of many shallow lakes in China. An indicator used to monitor trophic status is chlorophyll-a; however, collection and analysis can be spatially limiting and time consuming. In this study we utilized Landsat 7 ETM+ (Path/Row 119/39) imagery for West Lake, Hangzhou, to map chlorophyll-a concentrations. An optimal linear regression model with the band ratio ETM+3/ETM+1 (independent) and concurrent field-collected water quality measurements (dependant) was developed. The resulting model, lnChl.= 5.009 (ETM+3/ETM+1)-1.855, showed a strong (R2 = 0.815) ability to accurately map the distribution of chlorophyll-a. The straightforward approach carried out to assess this fresh-water lake in a rapidly developing region increased the level of information required to combat aquatic ecosystem degradation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Great Lakes Research - Volume 34, Issue 3, 2008, Pages 559-565