Your search found 2 records
1 Nagabhatla, Nidhi; Finlayson, Max; Senaratna Sellamuttu, Sonali; Wickramasuriya, R.; Pattnaik, C.; Narendra Prasad, S.; Gunawardena, A. 2007. Using geospatial tools to overcoming sustainability concerns for wetland ecosystem. Paper presented at the 28th Asian Conference on Remote Sensing, Kuala Lumpur, Malaysia, 12-16 November 2007. 8p.
Wetlands ; Ecosystems ; Analysis ; Remote sensing / Sri Lanka / India / Muthurajawela Marsh / Negombo Lagoon / Gujarat / Tamil Nadu / Lake Kolleru
(Location: IWMI HQ Call no: IWMI 333.91816 G744 NAG Record No: H040565)
http://www.a-a-r-s.org/acrs/proceeding/ACRS2007/Papers/TS17.2.pdf
https://vlibrary.iwmi.org/pdf/H040565.pdf
https://vlibrary.iwmi.org/pdf/H040565.pdf
(1.32 MB)
Wetlands are amongst the earth’s most productive ecosystem and directly and indirectly support millions of people by providing ecosystem services or benefits, many through maintenance of the hydrological system. Land use changes in developed and developing countries are resulting in gradual elimination of wetlands at global and regional scales. Moreover, anthropogenic pressure to convert wetlands for other land uses is reported to be increasing significantly from developing countries. The Convention on Wetlands is an international initiative that provides a framework for wetland inventory, assessment, monitoring and wise use worldwide. In support of the Convention a multi-scalar wetland inventory was developed by IWMI. At the global level, the distribution of Ramsar sites has been analysed, focusing on the role and impact of agriculture activities. At the regional scale, the role of geospatial data sets has been tested for identifying wetlands in India. In addition a multiple-scale site analysis, using earth observation data and GIS, is underway to detect trends in wetland use for a coastal lagoon-marsh wetland complex in Sri Lanka and for the inland fresh water Lake Kolleru, India. For the regional analysis, two different datasets viz., national wetland inventory data (from SACON-30m) and GIAM (Global Irrigated Area Map-500 m) were used. The preliminary analysis reflects 57 % overlap in wetland area for Gujarat and 10 % for Tamil Nadu. The geospatial change analyses (studied using IDRISI-Andes) in Sri Lanka reflect the loss of deep water lagoon(5%), littoral forest (2 %.) and marsh (1%) due to sedimentation, infilling, vegetation clearance and expansion in built up areas; hence identifying urban development, pollution and the population pressure as the primary ‘indicators of stress’. In Kolleru, the temporal spatial analysis addresses the balance in conservation measures and livelihood dynamics. We intend to integrate the biophysical and socio-economic parameters to explain the role of earth resource satellite data and geospatial tools for sustainable management of wetland systems.
2 Nagabhatla, Nidhi; Pattnaik, C.; Senaratna Sellamuttu, Sonali; Prasad, N.; Wickramasuriya, R.; Finlayson, M. 2009. Investigation of aquaculture dynamics at a Ramsar site, using earth observation systems in conjunction with a socio-economic assessment. Lakes and Reservoirs: Research and Management, 14(4):325-336. [doi: https://doi.org/10.1111/j.1440-1770.2009.00413.x]
Aquaculture ; Dynamics ; Wetlands ; Lakes ; Ecosystems ; Mapping ; Remote sensing / India / Kolleru Lake / Andhra Pradesh
(Location: IWMI HQ Call no: e-copy only Record No: H042523)
(0.37 MB)
This study presents a comprehensive site-scale analysis conducted within the global wetland inventory and mapping (GWIM) project. GWIM was developed and promoted by the International Water Management Institute (IWMI) through global partnerships to investigate wetland analyses at multiple scales. The present study investigates the complexity of an inland freshwater wetland system, presenting a conceptual framework for mapping and monitoring the dynamics of Lake Kolleru (a wetland of international importance, as defined by the Ramsar Convention), utilizing a geospatial platform. Illustrating the pace of land use changes leading to the progressive elimination of the wetland ecosystem of freshwater Lake Kolleru, this study also highlights the impacts of such changes on the socio-economic system. A comprehensive temporal analysis (1977-2007) provided a structural base to schematically analyse the dynamics of biophysical and ecological changes to the wetland by effectively using a spectrum of remote sensing data. The present status and changing trends in ecological dimensions of Lake Kolleru were illustrated, utilizing information from spatial analyses, complimented with socio-economic assessment. Attention is drawn to the potential of utilizing earth resources systems in exploring space-time interactions in freshwater ecosystems heavily modified through aquaculture interventions. Further, the spatial derivatives are meant as reference material for local authorities and decision-makers to rehabilitate the economic livelihood activities to the social community dependent on the lake ecosystem. The disseminated message emphasizes the applicability of geospatial tools to enhance the efficacy of the decision-making process by facilitating regular monitoring of ecosystem dynamics and providing updated information on wetland patterns and uses.
Powered by DB/Text WebPublisher, from
