نتایج جستجو برای: urban wetland

تعداد نتایج: 180821  

2009

Historically, the Everglades Agricultural Area (EAA) evolved under seasonally-flooded conditions that predominately supported sawgrass and other wetland vegetation. Over several thousand years, Histosol “muck” soils were deposited as organic matter accumulated above the limestone (calcium carbonate) bedrock. In the early 1900s, these soils were drained. Declining water table levels coupled with...

2016
Junfeng Xu Zhanqing Cai Tiantian Wang Guang Liu Peng Tang Xinyue Ye

Junfeng Xu 1,2, Zhanqing Cai 1,2, Tiantian Wang 1,2, Guang Liu 1,2, Peng Tang 1,2 and Xinyue Ye 3,* 1 Institute of Remote Sensing and Earth Sciences, Hangzhou Normal University, Hangzhou 311121, China; [email protected] (J.X.); [email protected] (Z.C.); [email protected] (T.W.); [email protected] (G.L.); [email protected] (P.T.) 2 Zhejiang Provincial Key Laboratory of Urban Wetland and Regional Chan...

Journal: :African Journal of Environmental Science and Technology 2017

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 ...

Journal: :J. Geographic Information System 2010
P. P. Nikhil Raj P. A. Azeez

A study of the spatial and temporal changes in land use and land cover (LULC) was conducted using Remote Sensing and GIS. We analyzed the LULC of Bharathapuzha river basin, south India using multispectral LANDSAT imageries of 1973-2005 time periods. 31% depletion in the natural vegetation cover and 8.7% depletion in wetland agriculture area were seen in the basin during the period. On the other...

2016
Stephen Marshall David Sharley Katherine Jeppe Simon Sharp Gavin Rose Vincent Pettigrove

Trace organic compounds associated with human activity are now ubiquitous in the environment. As the population becomes more urbanized and the use of pesticides and person care products continues to increase, urban waterways are likely to receive higher loads of trace organic contaminants with unknown ecological consequences. To establish the extent of trace organic contamination in urban runof...

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, ...

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...

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