نتایج جستجو برای: trophic index

تعداد نتایج: 410552  

Journal: :Journal of environmental biology 2009
Ayse Elmaci Nihan Ozengin Arzu Teksoy Fatma Olcay Topac Huseyin Savas Baskaya

Lake Uluabat, which is located in Marmara region, is one of the most productive lakes in Turkey. Due to concerns about potential pollution resulting from watershed sources and adjacent agricultural lands, a study of the trophic state of lake Uluabat was conducted during the period February 2003 to January 2004. Total nitrogen (TN), total phosphorus (TP), Secchi disc depth (SD) and chlorophyll a...

2015
Fernanda Sayuri Yoshino Watanabe Enner Alcântara Thanan Walesza Pequeno Rodrigues Nilton Nobuhiro Imai Cláudio Clemente Faria Barbosa Luiz Henrique da Silva Rotta Yu-pin Lin

Reservoirs are artificial environments built by humans, and the impacts of these environments are not completely known. Retention time and high nutrient availability in the water increases the eutrophic level. Eutrophication is directly correlated to primary productivity by phytoplankton. These organisms have an important role in the environment. However, high concentrations of determined speci...

Journal: :Aquatic Sciences 2022

Abstract Anthropogenic eutrophication is one of the consequences human activities observed from beginning urbanization processes and now a widespread problem around globe. Mitigation directly corresponds to achievement at least three main Sustainable Development Goals. Due complexity mechanisms, there are still many issues with managing this process its consequences, that complicate above-menti...

Journal: :Management of Aquatic Resources Journal (MAQUARES) 2018

ژورنال: سلامت و محیط زیست 2011
اکبرزاده, عباس, جعفری, فاطمه, فرمن اصغرزاده, دیانا, نوری, روح‌اله,

Backgrounds and Objectives: The Atrak River is an important water supply resource in the Razavi Khorasan, Northern Khorasan and Golestan provinces. This river is the line border of Iran and Turkistan countries. Unfortunately, lack of water quality and quantity data due to nonexistence of a proper surface water quality monitoring station network is one of the main problems for water quality eval...

2017
Barbara Parish JOHN H. OLIVE

Trophic assessments of 10 publicly-owned northeastern Ohio lakes including Aquilla, Baldwin, Findley, Hinckley, Hodgson (Muddy), Spencer, Lower Shaker, Upper Shaker, Virginia Kendall, and Wallace indicated that all were highly eutrophic. Criteria for these assessments were based on a Trophic State Index developed by the U.S. Environmental Protection Agency that incorporated epilimnetic levels o...

2002
Naomi E. Detenbeck Carol A. Johnston Gerald J. Niemi

A method developed to evaluate the cumulative effect of wetland mosaics on water quality was applied to 33 lake watersheds in the seven-county region surrounding Minneapolis-St. Paul, Minnesota. A geographic information system (GIS) was used to record and measure landscape variables derived from aerial photos. Twenty-seven watershed land-use and land-cover variables were reduced to eight princi...

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