نتایج جستجو برای: hoor al azim wetland

تعداد نتایج: 452938  

Journal: :Journal of environmental quality 2004
J M Novak K C Stone A A Szogi D W Watts M H Johnson

Dissolved phosphorus (DP) can be released from wetlands as a result of flooding or shifts in water column concentrations. Our objectives were to determine the long-term (1460 d) DP retention and release characteristics of an in-stream wetland, and to evaluate how these characteristics respond to flooding, draining, and changes in DP concentrations. The studied in-stream wetland drains an agricu...

Journal: :Remote Sensing 2015
Laura L. Bourgeau-Chavez Sarah L. Endres Michael Battaglia Mary Ellen Miller Elizabeth Banda Zachary M. Laubach Phyllis Higman Pat Chow-Fraser James Marcaccio

Methods using extensive field data and three-season Landsat TM and PALSAR imagery were developed to map wetland type and identify potential wetland stressors (i.e., adjacent land use) for the United States and Canadian Laurentian coastal Great Lakes. The mapped area included the coastline to 10 km inland to capture the region hydrologically connected to the Great Lakes. Maps were developed in c...

Journal: :Journal of environmental quality 2010
Alexander W Cheesman Ed J Dunne Benjamin L Turner K Ramesh Reddy

Newly created and restored wetlands play an important role in sequestering excess nutrients at the landscape scale. In evaluating the long-term efficacy of nutrient management strategies to increase wetland capacity for sequestering P, information is needed on the forms of P found across the upland-wetland transition. To assess this, we studied soils (0-10 cm) from four wetlands within cow-calf...

1998
Mark J. Brown

Recent,forest inventories of North Carolina, South Carolina, and Virginia, included sampling for hvdr-ic x,egetution, hydrk soils, and wetland hydrology. Forest samples that met all 3 of these criteriu were classified us ,forested wetland. This study characterizes wetland ,forests by extent, owner, uge, ,forest type, physiogruphy, volume, growth. and removuls, and evaluates its contribution to ...

2012
Xuehong Wang Junbao Yu Di Zhou Hongfang Dong Yunzhao Li Qianxin Lin Bo Guan Yongli Wang

In this study, we compared ecological characteristics of wetland vegetation in a series of restoration projects that were carried out in the wetlands of Yellow River Delta. The investigated characteristics include plant composition structure, species diversity and community similarity in three kinds of Phragmites australis wetlands, i.e. restored P. australis wetlands (R1, R2, R3 and R4: restor...

2010
Olalekan Adekola Sylvie Morardet Rudolf de Groot Frédéric Grelot

The size of the Ga-Mampa wetland (1 km), in the Olifants River catchment in South Africa, was halved between 1996 and 2004. This jeopardizes the ecological integrity and influences the benefits people obtain from the wetland. This study therefore analysed the economic values of the provisioning services derived from the Ga-Mampa wetland and evaluated their contribution to the livelihoods of loc...

2011
D. F Spector J. M. Bischoff E. A. Matthiesen

Wetlands in older urban areas have often been integrated into stormwater management systems and exhibit severe degradation from receiving decades of untreated and uncontrolled urban runoff. Vegetative diversity is often poor and dominated by a few hardy species such as cattail (Typha latifolia) or reed canary grass (Phalaris arundinacea). These wetlands may also be affected by legacy impacts fr...

Journal: :Remote Sensing 2012
Julia Reschke Annett Bartsch Stefan Schlaffer Dmitry Schepaschenko

Wetlands store large amounts of carbon, and depending on their status and type, they release specific amounts of methane gas to the atmosphere. The connection between wetland type and methane emission has been investigated in various studies and utilized in climate change monitoring and modelling. For improved estimation of methane emissions, land surface models require information such as the ...

Journal: :Environmental Modelling and Software 2005
Ron Janssen Hasse Goosen Mariken L. Verhoeven Jos T. A. Verhoeven A. Q. A. Omtzigt Edward Maltby

This paper demonstrates the use of a wetland decision support system to support management decisions on a Dutch wetland

2015
Qingqing Cao Renqing Wang Haijie Zhang Xiuli Ge Jian Liu Ben Bond-Lamberty

Wetland ecosystems are represented as a significant reservoir of organic carbon and play an important role in mitigating the greenhouse effect. In order to compare the compositions and distribution of organic carbon in constructed and natural river wetlands, sediments from the Xinxue River Constructed Wetland and the Xinxue River, China, were sampled at two depths (0-15 cm and 15-25 cm) in both...

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