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Session 16 : Google earth engine and remote sensing applications - Ms.Supriya Sharma, Scientist/Engineer SC, IIRS-ISRO Government of India
Highlights of the Session - 16
• The brief introduction to Google earth engine, how it works, the reasons for considering it as powerful platform like public data catalogue, processing powers, save and share work routine, interactive development programs were explained in detail.
• Google earth Engine code Editor (Javascript) and use of various tabs like search for datasets, imports, save script, run script, script manager, documentation, asset manager, geometry tools, task manager, console output, inspect locations and pixel values, layer manager were narrated.
• The different spatial data types like raster objects, vector objects, various functions like map, filter, machine learning, band math, UI widgets were also briefed.
• The process flow of Google Earth Engine including import collection, Filter collection, perform analysis, display/ export results and create apps were given insight.
• The speech highlighted the advantages of using GEE for geospatial analysis. She has explained an application of Forest cover loss detection, its features like detection of global forest cover, detection of areas of forest cover loss, comparison of forest cover loss for different states, variation inn forest cover loss over years, maps the forest cover loss over years, maps the forest cover loss for a chosen state.
• Various insight into Hausen.et.al global forest change data, its user interface with the examples of forest change detection in Assam and Arunachal Pradesh.
• The water quality parameter analysis using GEE, its features, applications, data used and about the GEE based water quality analysis tool developed at IIRS, its processes like multi temporal image filtering, image mosaicking, image pre-processing, water quality parameter mapping, data visualisation and export, its user interface with examples of chlorophyll mapping in lake Lonar (Maharashtra), Prayagraj (UP) were revealed to participants with Codal provisions.
• Insight into GEE based flood mapping tool developed at IIRS with example Automated flood mapping of Bihar (2019). She gave a detailed demonstration on forest cover mapping and water quality analysis using Sentinel-2 and other applications using Landsat 8 data.
Session 17 : Remote sensing applications to water resources - Dr E.Siva Sankar, Scientist/Engineer SG, NRSC-ISRO Government of India
Highlights of the Session - 17
• Satellite data – derivatives in the field of Water Resources such as surface water content, landuse/landcover, snow and glacier contents, river configuration, etc and the follwoing topics were addressed in the FDP.
• Applications of Remote sensing in water resource management are discussed under five broad sub-domains- Assessment, Planning, Development, Monitoring and Evaluation & management.
• Water Resources availability by Water Body Information System(WBIS).
• Inventory and modelling of glacial lakes and water bodies in Himalayan region of Indian river basins, Snowmelt runoff forecasting in Himalayan basins and Spatial snowmelt runoff product in Indian Himalayas.
• Reassessment of water resources of India using space inputs- a NRSC & CWC joint study. 1993 Vs 2017 estimate comparison.
• Water Resource infrastructure - Planning and Development with case studies of submergence area analysis of Sardar Sarovar project , Neemkheda project.
• Water Resources Infrastructure monitoring.- NRSC went on cross verification of Accelerated Irrigation Benefit Program(AIBP). AIBP is a flagship program of Government of India under PMKSY for expeditious completion of ongoing irrigation projects.
• Irrigation Command Area Management, which includes Irrigated agriculture - Geo-spatial applications such as Infrastructure creation progress monitoring, Irrigation system performance, etc.
• Irrigation System performance monitoring through the years was explained with the example of Hirakud command area, monitoring of irrigation potential utilisation was briefed with Jurala project, Telengana state.
• Tank/ minor irrigation water management and satellite data based irrigation scheduling.
• Watershed management through EO inputs can be carried out through watershed prioritization and action plan, concurrent monitoring of implementation, impact assessment.
• Integrated mission for sustainable development, monitoring of watersheds and rural assets, impact of farm ponds in watersheds, outcome of web based monitoring of watersheds, groundwater prospect mapping and quality, large scale mapping for priority areas was briefed in.
• Water use estimation by modified Priestley Taylor methodology, disaster management support by near real time flood inundation mapping, flood hazard zonation for Assam, Bihar, Odisha & U.P., etc.
• India Water Resources Information System - ‘India-WRIS', Telengana Water Resources Information System-TWRIS, Andhra Pradesh Water Resources Information and Management Systems -APWRIMS
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