Your search found 19 records
1 Nagabhatla, Nidhi; Roy, P. S.; Jagdale, R. 2006. Evaluating the change (1968-2001) in landscape pattern and analyzing disturbance in Baratang Forest Division (Andaman Islands), South East Asia. GIS Development, 2(32). 8p.
Remote sensing ; Climate change ; Forest ecology ; Environmental effects ; Ecosystems ; Land use / South East Asia / Andaman Islands / Baratang Forest
(Location: IWMI-HQ Call no: IWMI 577.3 G637 NAG Record No: H038991)
2 Nagabhatla, Nidhi; Roy, P. S. 2007. Measuring landscape parameters: Fragmentation, disturbance and biological richness in Baratang Islands (Andaman) for estimating landscape structure, human and environment interlinkages. International Journal of Ecology and Development, 7(S07):22-35.
Ecosystems ; Ecology ; Biodiversity ; Monitoring ; Models / South East Asia / India / Andaman Islands / Nicobar Islands / Baratang Forest
(Location: IWMI-HQ Call no: IWMI 577 G637 NAG Record No: H038992)
3 Nagabhatla, Nidhi; Roy, P. S. 2006. Modeling the distribution of Pterocarpus dalbergioides (Padauk) at landscape level using a geospatial approach, in Andaman- Bay Islands – South Asia. In Dayawansa, N. D. K. (Ed.). Geoinformatics for Environmental Conservation and Management: Third National Symposium on Geoinformatics, Sri Lanka, 25 August 2006. Peradeniya, Sri Lanka: Geo-Informatics Society of Sri Lanka. pp.35-43.
Pterocarpus dalbergioides ; Environmental effects ; Models ; Remote sensing ; Forests / South Asia / Andaman Islands / Baratang Island
(Location: IWMI-HQ Call no: IWMI 634.9 G637 NAG Record No: H039099)
4 Nagabhatla, Nidhi; Finlayson, Max; Senaratna Sellamuttu, Sonali; Zomer, Robert; Diphoorn, Luuk. 2006. Wetland dynamics: Links with spatial, ecological and socio-economic related issues in the western coastal belt of Sri Lanka. In Ninth Biennial Conference of The International Society for Ecological Economics “Ecological Sustainability and Human Well-being,” held at the India Habitat Centre, New Delhi, India, 16-18 December 2006. New Delhi, India: Indian Society for Ecological Economics. (E-proceedings) 16p.
Wetlands ; Assessment ; Lagoons ; Marshes ; Ecology ; Ecosystems ; Social aspects ; Economic aspects / Sri Lanka / Muthurajawela Marsh / Negombo Lagoon
(Location: IWMI-HQ Call no: IWMI 333.91 G744 NAG Record No: H039638)
(7.41 MB)
5 Rebelo, Lisa-Maria; Finlayson, Max; Nagabhatla, Nidhi; Zomer, Robert. 2006. Capacity building for multiple scale wetland inventory, mapping and change analysis. In Proceedings, GlobWetland: Looking at Wetlands from Space, Frascati, Italy, 19-20 October 2006. 6p.
(Location: IWMI-HQ Call no: IWMI 333.918 G000 REB Record No: H039730)
6 Nagabhatla, Nidhi; Roy, P. S.; Jagdale, R. 2007. Monitoring spatial distribution of commercial rattans and palms in the tropical forest of Baratang Islands (Andaman and Nicobar Islands) Indian Journal of Traditional Knowledge, 6(4):630-635.
Forest products ; Arecaceae ; Cane ; Bamboos ; Remote sensing ; Maps / South East Asia / Andaman Islands / Nicobar Islands / Baratang Islands
(Location: IWMI HQ Call no: IWMI 333.75 G800 NAG Record No: H040451)
Tropical forests are diverse and highly productive of all existing ecosystems. The need of the hour is to protect them from the devastating effect of development. The initiative requires not only assessment of the change in vegetation pattern over years but continuous monitoring of associated diversity as well. Since, the extraction activities in the islands are under check in the existing management policies, the economic upliftment has switched over to the non-forest timber products (NNTP’s) (mainly canes and bamboos). The study proposes to foreground the islands having maximum cane diversity and have spotlight a comparative account of distribution in different parts of Andaman & Nicobar Islands. The potential use of remote sensing is highly promising and the study is an approach for multidisciplinary assessments. The study is carried out in the tropical forests of Baratang Forest Division, Andaman Islands for the estimation of rattan and cane resources. The study has aimed to highlight the areas having dense growth of NTPF’s using spatial analysis. Distribution pattern of Licula peltata, a palm of high commercial importance has also been analysed. It also attempts to prepare map for the region highlighting areas of high rattan diversity using IRS IC LISS-III data. The necessary set of attributes at a resolution sufficient for monitoring the distribution of rattan species in the islands is also described. A vegetation cover type map was prepared and the ground details were integrated to establish a correlation between the upper storey and the under storey forms.
7 Nagabhatla, Nidhi; Senaratna Sellamuttu, Sonali. 2007. Understanding and documenting cross-disciplinary research in wetland systems. Water Matters: news of IWMI research in Sri Lanka, 3:3.
(Location: IWMI HQ Call no: IWMI 577.68 G744 IWM Record No: H040539)
8 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.
9 Pattanaik, C.; Narendra Prasad, S.; Nagabhatla, Nidhi; Finlayson, Max. 2008. Kolleru regains its grandeur. Current Science, 94(1):9-10.
Lakes ; Habitats ; Birds ; Fish ; Water pollution ; Flooding ; Wetlands ; Rehabilitation / India / Andhra Pradesh / Kolleru Lake
(Location: IWMI HQ Call no: IWMI 333.9163 G635 PAT Record No: H040734)
10 Nagabhatla, Nidhi. 2007. Wetlands and remote sensing: the way ahead. In Cleveland, C. J. (Ed.). The encyclopedia of earth. Washington, DC, USA: Environmental Information Coalition, National Council for Science and the Environment. 5p.
(Location: IWMI HQ Call no: IWMI 577 G000 NAG Record No: H040821)
http://www.eoearth.org/article/Wetlands_and_remote_sensing:_the_way_ahead
https://vlibrary.iwmi.org/pdf/H040821.pdf
https://vlibrary.iwmi.org/pdf/H040821.pdf
11 Nagabhatla, Nidhi; Thenkabail, Prasad. 2008. Re-visioning spatial data and knowledge for sustainable development. ASM Newsletter, 14 February. 2p.
Water resource management ; Land management ; Wetlands ; Mapping ; Remote sensing ; GIS ; Decision support tools
(Location: IWMI HQ Call no: IWMI 621.3678 G000 NAG Record No: H040849)
12 Nagabhatla, Nidhi. 2008. Questioning the geoscience community: are we on the right track? Current Science, 94(7): 839-840.
(Location: IWMI HQ Call no: IWMI 333.72 G000 NAG Record No: H041064)
13 Nagabhatla, Nidhi; Senaratna Sellamuttu, Sonali. 2008. Political ecology of wetland management: the post aquaculture demolition case of Lake Kolleru in India. Revista Geografica Academica, 2(1): 10-19.
(Location: IWMI HQ Call no: IWMI 577.68 G635 NAG Record No: H041396)
The present study highlights the uncertainties that govern wetland management using the Kolleru Wetland case study. The largest fresh water lake and an Ramsar site of international importance it has circled around over past half century from being a fresh water balancing reservoir to agriculture land and shifting as a aquaculture treasure island and lastly ceasing to the aquaculture demolition vis’-a-vis’ restoration conflict in 2007. As nearly all stopovers of this journey was driven by policy shift that demanded economic benefit while surpassing ecological and social community growth. We hereby discuss the event and the analysis of the present state of affairs also spotlighting the major concerns on multiple fronts.
14 Nagabhatla, Nidhi; Finlayson, Max; Senaratna Sellamuttu, Sonali; Gunawardena, A. 2008. Application of geospatial tools to monitor change in a micro-tidal estuary for the purpose of management planning. Ceylon Journal of Science (Biological Sciences), 37(1):73-86.
Wetlands monitoring ; Mapping ; Models ; Estuaries ; Ecosystems ; Lagoons ; Mangroves / Sri Lanka / Negombo / Muthurajawela Marsh / Sedawatte
(Location: IWMI HQ Call no: IWMI 333.918 G744 NAG, PER Record No: H041544)
http://www.sljol.info/index.php/CJSBS/article/download/497/535
https://vlibrary.iwmi.org/pdf/H041544.pdf
https://vlibrary.iwmi.org/pdf/H041544.pdf
15 Nagabhatla, Nidhi; Saimone, F.; Juizo, D.; Masiyandima, Mutsa. 2008. Seasonality dynamics for investigating wetland agriculture nexus and its ecosystems service values in Chibuto, Mozambique. In Humphreys, E.; Bayot, R. S.; van Brakel, M.; Gichuki, F.; Svendsen, M.; Wester, P.; Huber-Lee, A.; Cook, S. Douthwaite, B.; Hoanh, Chu Thai; Johnson, N.; Nguyen-Khoa, Sophie; Vidal, A.; MacIntyre, I.; MacIntyre, R. (Eds.). Fighting poverty through sustainable water use: proceedings of the CGIAR Challenge Program on Water and Food, 2nd International Forum on Water and Food, Addis Ababa, Ethiopia, 10-14 November 2008. Vol.3. Water benefits sharing for poverty alleviation and conflict management; Drivers and processes of change. Colombo, Sri Lanka: CGIAR Challenge Program on Water and Food. pp.41-45.
Wetlands ; Agroecosystems ; Poverty ; Floodplains ; Cultivation ; Crop production ; Grazing lands ; Land use / Mozambique / Chibuto / Changane River / Limpopo River basin
(Location: IWMI HQ Call no: IWMI 333.91 G000 HUM Record No: H041851)
http://cgspace.cgiar.org/bitstream/handle/10568/3708/IFWF2_proceedings_Volume%20III.pdf?sequence=1
https://vlibrary.iwmi.org/pdf/H041851.pdf
https://vlibrary.iwmi.org/pdf/H041851.pdf
(0.35 MB)
16 Rebelo, Lisa-Maria; Finlayson, C. Max; Nagabhatla, Nidhi. 2009. Remote sensing and GIS for wetland inventory, mapping and change analysis. Journal of Environmental Management, 90:2144-2153. [doi: https://doi.org/10.1016/j.jenvman.2007.06.027]
Remote sensing ; GIS ; Wetlands ; Surveys ; Mapping ; Case studies ; Capacity building ; Stakeholders / Sri Lanka / Southern Africa / Malawi / Muthurajawela Marsh / Negombo Lagoon / Lake Chilwa
(Location: IWMI HQ Call no: e-copy only Record No: H042129)
(0.93 MB)
A multiple purpose wetland inventory is being developed and promoted through partnerships and specific analyses at different scales in response to past uncertainties and gaps in inventory coverage. A partnership approach is being promoted through the Ramsar Convention on Wetlands to enable a global inventory database to be compiled from individual projects and analyses using remote sensing and GIS. Individual projects that are currently part of this global effort are described. They include an analysis of the Ramsar sites’ database to map the distribution of Ramsar sites across global ecoregions and to identify regions and wetland types that are under-represented in the database. Given the extent of wetland degradation globally, largely due to agricultural activities, specific attention is directed towards the usefulness of Earth Observation in providing information that can be used to more effectively manage wetlands. As an example, a further project using satellite data and GIS to quantify the condition of wetlands along the western coastline of Sri Lanka is described and trends in land use due to changes in agriculture, sedimentation and settlement patterns are outlined. At a regional scale, a project to map and assess, using remote sensing, individual wetlands used for agriculture in eight countries in southern Africa is also described. Land cover and the extent of inundation at each site is being determined from a multi-temporal data set of images as a base for further assessment of land use change. Integrated fully within these analyses is the development of local capacity to plan and undertake such analyses and in particular to relate the outcomes to wetland management and to compile data on the distribution, extent and condition of wetlands globally.
17 Nagabhatla, Nidhi; Finlayson, Max; Senaratna Sellamuttu, Sonali. 2009. Spatial dynamics versus social dynamics: understanding trade offs in ecological and socio-economic systems. In Malhotra, G. (Ed.). Environmental growth: a global perspective. New Delhi, India: Macmillan. pp.16-31.
Wetlands ; Lagoons ; Marshes ; Ecology ; Land cover ; Environmental effects ; Surveys / Sri Lanka / Muthurajawela Marsh / Negombo Lagoon
(Location: IWMI HQ Call no: e-copy only Record No: H042398)
(2.28 MB)
18 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.
19 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.
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