Your search found 5 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.
3 Nagabhatla, Nidhi; Wickramasuriya, R.; Prasad, N.; Finlayson, M. 2010. A multi-scale geospatial study of wetlands distribution and agricultural zones, and the case of India. Tropical Conservation Science, 3(3):344-360.
(Location: IWMI HQ Call no: e-copy only Record No: H043503)
http://tropicalconservationscience.mongabay.com/content/v3/10-09-27_344-360_Nagabhatla_et_al.pdf
https://vlibrary.iwmi.org/pdf/H043503.pdf
https://vlibrary.iwmi.org/pdf/H043503.pdf
(0.67 MB)
This paper highlights the global and the regional scale representation of wetlands ecosystems using geospatial tools and multiple data sets. At global scale, the Ramsar database is investigated for representation of the wetlands sites of international importance against the “global agricultural zones” derived from the thematic aggregation of Global Irrigated Area Map databases. The analysis of “Ramsar sites” under cultivation reflects the present trend in wetlands use for agriculture. The scenario is also compared with the historical pattern derived from Vavilov’s food zones of 1926. Observed is an aggregate increase in cropped wetlands area from 25% (1926) to 43% (2006). The second component develops a regional partnership with Salim Ali Centre for Ornithology and Natural History in India. The partnership reviews the thematic national database of inland wetlands and “priority wetlands habitats” (PWH) in comparison with the bio-geographic and agro-ecological factors (regions/sub-regions) and by means of geographical information system (GIS) tools. We elaborate the strength of spatial tools to better understand the relationship between wetlands distribution and agricultural zones, both historically and at the present time. The disseminated message states, though from a technical perspective, the understanding of scale and resolution in combining information from diverse sources is essential; the effective implementation of spatial analysis requires a true cross-disciplinary approach. Complementing that, relevant policy support and appropriate institutional arrangements are fundamental to advance the management work required for unification of wetlands conservation with the existing challenges of food and livelihood security.
4 Nagabhatla, N.; Senaratna Sellamuttu, Sonali; Bobba, A. G.; Finlayson, M.; Wickramasuriya, R.; van Brakel, Martin; Prasad, S. N.; Pattanaik, C. 2012. Insight to Ecosystem Based Approach (EBA) at landscape level using a geospatial medium. Journal of the Indian Society of Remote Sensing, 40(1):47-64. [doi: https://doi.org/10.1007/s12524-011-0080-8]
Ecosystems ; Wetlands ; Landscape ; Multiple use ; Agroecology ; GIS ; Remote sensing ; Social aspects / Sri Lanka / India / Lake Kolleru / Muthurajawela Marsh / Negombo Lagoon
(Location: IWMI HQ Call no: e-copy only Record No: H044044)
(0.95 MB)
Ecosystem based approach (EBA) for resource management is a concerted, environmentally tuned and an integrated framework that holistically addresses the ecological character of the natural resource, its societal benefit spectrum and its environmental functions. In this paper, the EBA concept is closely linked with the emerging concept of multiple use systems (MUS) while taking account of environmental, economic, and social factors that govern the ecosystems services and benefits. We elucidate a multi-scalar approach and multiple case studies to understand EBA particularly in context of a wetlandscape. At the global scale, Ramsar sites of international importance are geospatially analyzed with reference to their agro-ecology and biodiversity. At regional scale, the agrarian use of inland wetlands in India was re-evaluated taking account of database from a recent inland wetland inventory. At the local scale, drawing on the landscape characterization and the ecological economics for fresh water Lake Kolleru in India and the Muthurajawela Marsh-Negombo Lagoon coastal marsh in Sri Lanka, we illustrate some of the practical challenges in balancing wetland conservation, development needs and the overall well-being of local people. We also discuss how variability in the scale, geophysical characteristics of the site and the data availability confines the ability to simplify a single complete approach to address issues in complex ecosystem such as wetlands. All levels of the study are supported by a variety of earth observation data and the geographical information system (GIS) tools. The site level analysis also draws on socio-economic assessment tools.
5 Nagabhatla, N.; Dhyani, S.; Finlayson, C. M.; Senaratna Sellamuttu, Sonali; van Brakel, Martin; Wickramasuriya, R.; Pattanaik, C.; Prasad, S. N. 2012. A case study approach to demonstrate the use of assessment and monitoring as tools for participatory environmental governance. Ecologia, 2(3):60-75.
Case studies ; Environmental effects ; Governance ; Agroecology ; Lakes ; Freshwater ; Ecosystems ; Wetlands ; Forests ; Downstream ; Floodplains ; River basins ; Resource management ; Institutions ; Public-private cooperation ; Nature reserves ; Wildlife / India / Bangladesh / Kolleru Lake / Krishna River Basin / Ganges River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H044782)
http://scialert.net/qredirect.php?doi=ecologia.2012.60.75&linkid=pdf
https://vlibrary.iwmi.org/pdf/H044782.pdf
https://vlibrary.iwmi.org/pdf/H044782.pdf
(0.93 MB) (958.32KB)
Effective implementation of participatory environmental governance faces a number of challenges, including the need for appropriate mechanisms and incentive systems that can operate across multiple-use landscapes. This study demonstrated scenarios for such governance from three agro-ecological zones in different geographical, biophysical and socio-cultural settings: (i) Kedarnath Wildlife Sanctuary in the temperate forests of the Central Himalayas, (ii) Kolleru Lake, a freshwater lake in the Krishna Basin and (iii) the downstream Ganges seasonal floodplains in Bangladesh. The cross-disciplinary set of approaches in these examples involves the use of spatial tools and socioeconomic surveys to build a scenario-based framework with cross-scaling prospects. The comparative analysis between these sites is significant in the context of providing guidance for trans-boundary environmental governance and the underlying challenges that occur in politically complex and common property resource institutional arrangements. Meeting these challenges will assist in the efforts, locally and nationally, to make wise use of all wetlands, as required under the Ramsar Convention on Wetlands. Kedarnath Wildlife Sanctuary symbolizes a case of increasing anthropogenic pressure, limited livelihood options and with gaps in the governance structure. Kolleru Lake represents a case of inadequate understanding of the ecological dimensions of livelihood interventions and the consequential community conflict. The case of floodplains in Bangladesh illustrates the potential of collective action, supported by appropriate institutional arrangements, for improving rice-fish productivity. The case studies support the argument that monitoring and assessment of the resource structure and its dynamics, with the application of geospatial tools, adds value when shaping a framework for policy debate and for ensuring the wise use of wetlands.
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