This study establishes an information system of the wetlands and lakes on the Qinghai-Tibet Plateau. We sort up on the wetlands and use Visual Basic 6.0 for the management and development of MapObjects, and the ArcSDE pattern to place the spatial and attribute data into the Microsoft SQL Server relational integrated database. We demonstrate how this Wetland Information System, containing all th...

Using wetlands as sink of nutrients, phosphorus in particular, is becoming an increasingly attractive alternative to conventional wastewater treatment technology. In this paper, we brie y review the mechanism of phosphorus retention in wetlands, as well as previous modeling e orts. A Bayesian method is then proposed for estimating the long-term phosphorus accretion rate in wetlands through a pi...

We evaluated the potential of prairie wetlands in North America as carbon sinks. Agricultural conversion has resulted in the average loss of 10.1 Mg ha(-1) of soil organic carbon on over 16 million ha of wetlands in this region. Wetland restoration has potential to sequester 378 Tg of organic carbon over a 10-year period. Wetlands can sequester over twice the organic carbon as no-till cropland ...

Wetlands are most important and valuable ecosystem for maintaining biodiversity on the planet. In present scenario wetlands are vulnerable to climate change and land conversion activities like agriculture and urbanization. Due to their important fine temporal scale monitoring of sensitive wetlands are required. For this purpose few tools are specified to monitor the wetland at landscape scale. ...

Wetlands provide valuable ecosystem services to society. Yet, in many parts of the world, wetlands have been degraded or lost, and demand for development—particularly from agriculture—is putting pressure on many of those that remain. Policymakers and planners have to consider a bewildering set of biophysical, economic and social factors when deciding whether or not wetlands should be developed ...

Canopy, woody understory, and herbaceous strata of headwater wetlands were quantitatively sampled in the inner coastal plain of Virginia and Maryland. Canopy species distribution patterns were then compared with field indicators of hydrologic regime using Detrended Correspondence Analysis (DCA). Sixteen canopy species, 21 subcanopy species, 9 vine species, and 40 herbaceous species were encount...

Although wetlands in Tanzania and Kenya have great potentials for agricultural production and a multitude of uses, many of them are not even documented on official maps. Lack of official recognition has done little in preventing there over utilization. As the wetlands continue to play remarkable roles in the movement of people and terrestrial species in the region, it is important that they are...

P. Speldewinde Centre of Excellence in Natural Resource Management, The University of Western Australia, Albany, Australia e-mail: [email protected] Abstract Human health is directly linked to ecosystem functioning, including the dynamics within wetlands. Wetlands can act to initiate or mitigate biological and chemical contamination. In order to assess the potential health risk, inve...

Our objective was to develop an interactive information and visualization framework for Floridas wetlands. We standardized and integrated 2,130 geo-referenced point observations of 78 different physical, chemical, and biological attributes collected in Florida's wetlands from 1987 to present. A Web-based GIS tool was created with ArcIMS to augment these point observations with other GIS layers ...

Using multi-temporal European Remote-sensing Satellites (ERS-1/-2) and Canadian Radar Satellite (RADARSAT-1) synthetic aperture radar (SAR) data over the Louisiana coastal zone, we characterize seasonal variations of radar backscattering according to vegetation type. Our main findings are as follows. First, ERS-1/-2 and RADARSAT-1 require careful radiometric calibration to perform multi-tempora...