نتایج جستجو برای: salinity of wetland

تعداد نتایج: 21167564  

2004
LG Naranjo

A wetland inventory and assessment was made as a basis for development of a national wetlands policy for Colombia (CMWP). Major wetlands were identified from a 1:1 500 000 scale national hydrological map. Of 57 major wetlands in 27 catchments or wetland complexes, wetlands in 16 of these were selected for assessment. Wetland type, ecological status and wetland value for each wetland was scored ...

Koshafar, Azita, Velayatzadeh, Mohammad,

Background and Aim:This research was conducted of determining and comparing the heavy metals of zinc, iron, manganese, copper, nickel and vanadium in summer in waters and sediments of Naseri wetland in Khuzestan province, 2017. Material and Methods:Sampling of water and sediments from three areas of north, central and southern Naseri wetland was carried out in summer. In order to measure heavy...

ژورنال: سلامت و محیط زیست 2019

Background and Objective: Research has shown that assessing the toxicity and ecological risk of various types of pollutants, including heavy metals, using specific indicators, is indispensable in the ecological risk assessment of the ecosystem. Accordingly, the aim of this study was the assessment of the ecological effect of heavy metals presence (Pb, Zn, Cu, Cd and, As) in Anzali wetland using...

Journal: :محیط شناسی 0
داوود مافی غلامی دانشگاه شهرکرد نبی الله یارعلی دانشگاه شهرکرد

according to performed classification by ramsar convention (1971), choghakhor is one of the most valuable wetlands of iran. despite of high abilities of perspective and variation of habitats, tourism valuations are not considered. in this study, promenade valuation choghakhor wetland was estimated by using zonal travel cost method. these methods is based on using map, sight, social-economical c...

2002
MERRY Richard

The study site is a typical, perched wetland in a saline, sulfidic discharge area in the eastern Mt Lofty Ranges near Adelaide, South Australia. The wetland is part of the 10% of strongly waterlogged landscape identified by GIS analysis of a larger 80 km area. Approximately 40% of this area was identified as being poorly drained, but only a small proportion, less than 10%, supports wetland vege...

ژورنال: سلامت و محیط زیست 2011
بهرامی فر, نادر, خسروی, معصومه, قاسمپوری, سید محمود,

Background and Objectives:Anzali Wetland is one of the most important aquatic ecosystems of Iran which is located in south-west of the Caspian sea. This Wetland provides a suitable and non-market price habitat for valuable fish and aquatic animals which have an important role in the life cycle of this ecosystem. This study reports the results of some heavy metals contamination monitoring in sup...

ژورنال: علوم آب و خاک 2019

Today, the use of refined urban wastewater for agriculture is growing considerably. One of the methods for the natural treatment of wastewater is the constructed wetland. In this study, the effects of three and six days retention time on the vertical, horizontal and hybrid constructed wetland (first vertical and then horizontal) with perlite beds and Cyperus plants on the urban wastewater were ...

2017
Baolei Zhang Qiaoyun Zhang Chaoyang Feng Qingyu Feng Shumin Zhang Monika Kopecka

Long-term intensive land use/cover changes (LUCCs) of the Yellow River Delta (YRD) have been happening since the 1960s. The land use patterns of the LUCCs are crucial for bio-diversity conservation and/or sustainable development. This study quantified patterns of the LUCCs, explored the systematic transitions, and identified wetland change trajectory for the period 1976–2014 in the YRD. Landsat...

Journal: :Water research 2013
Atreyee Sims Yanyan Zhang Shashikanth Gajaraj Pamela B Brown Zhiqiang Hu

Wetland assessment tools are being developed and employed in wetland monitoring and conservation based on physical, chemical and biological characterization. In wetland biological assessment, various ecological functions have been described by biological traits of an entire species pool that adapts to different types of wetland environments. Since microorganisms play a key role in wetland bioge...

2012
Kun Ma Liangzhi You Junguo Liu Mingxiang Zhang

Wetlands play important ecological, economic, and cultural roles in societies around the world. However, wetland degradation has become a serious ecological issue, raising the global sustainability concern. An accurate wetland map is essential for wetland management. Here we used a fuzzy method to create a hybrid wetland map for China through the combination of five existing wetlands datasets, ...

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