CSU Phil-LiDAR 1 and 2 Project Teams, ITSO Director attend Intellectual Property Workshop in UP Diliman

Engrs. Meriam Makinano-Santillan and Jojene R. Santillan (CSU Phil-LiDAR 1 Project Leader and Chief Science Research Specialist), Engr. Anna Marie Pondog (CSU Phil-LiDAR 2 OIC Project Leader), and Engr. Jeffrey T. Dellosa (CSU Innovation and Technology Support Office – ITSO Director) attended the one-day Phil-LiDAR 1 and 2 Program Intellectual Property (IP) Workshop last August 30, 2016 at the National Engineering Center Audio-Visual Room, University of the Philippines in Diliman, Quezon City.

The IP Workshop was held to gather Project Leaders and Researchers of various projects of the Phil-LiDAR 1 and 2 Programs that are implemented nationwide by 15 Higher Educational Institutions (HEIs), including representatives from IP Offices or ITSO Offices of each HEI. The Phil-LiDAR 1 and Phil-LiDAR 2 Programs (www.dream.upd.edu.ph) are Department of Science and Technology (DOST) initiatives that engage the University of the Philippines-Diliman and 15 Higher Education Institutions (HEIs) throughout the country to produce detailed flood hazard and resource maps using LiDAR technology. Generation of the Programs’ LiDAR and LiDAR-derived datasets involves workflows shared between UP Diliman and partner HEIs. As such, the intellectual property (IP) rights of the partners and that of the two programs must be equally protected. Therefore, the workshop was aimed to produce IP/data sharing protocols and documents (e.g. EULA, MOA, etc.) that protect each party’s IP rights as well guide the users of the Program’s datasets.

The Workshop started with a message from Dr. Ariel C. Blanco, the Phil-LiDAR 2 Program Leader. It was followed by an overview of the goals of the workshop. After this, various principles of Technology Transfer including devolution, copyright, and Fairness Opinion Report (FOR) was discussed by Mr. Cedrik Ben Gayares, Invention Patent and Technology Management Officer of the Technology Transfer and Business Development Office (TTBDO) of the UP System. The discussion was followed by a presentation of the proposed Phil-LiDAR 1 and 2 IP Sharing Terms of Reference (TOR) by Dr. Luis G. Sison, Director of the TTBDO. Representatives from each HEIs and the resource persons discussed the roles and resources of each HEIs on the said TOR. Dr. Sison also led the participants in the examination, deliberation and evaluation of the generated draft IP Sharing Memorandum of Agreement (MOA), including the discussion of rights and royalties. The proposed End User License Agreement (EULA) that will form part of the data sharing mechanisms of the Phil-LiDAR 1 and 2 Programs was likewise discussed.

The two main resource persons in the IP Workshop: Dr. Luis G. Sison and Mr. Cedrik Ben Gayares, Director and Invention Patent and Technology Management Officer, respectively, of the Technology Transfer and Business Development Office (TTBDO) of the UP System.

The two main resource persons in the IP Workshop: Dr. Luis G. Sison and Mr. Cedrik Ben Gayares, Director and Invention Patent and Technology Management Officer, respectively, of the Technology Transfer and Business Development Office (TTBDO) of the UP System.

csu-reps

CSU representatives to the IP Workshop (from left to right): Engr. Jeffrey T. Dellosa (ITSO Director), Engr. Anna Marie Pondog (CSU LiDAR 2 OIC Project Leader), Engr. Meriam Makinano-Santillan (CSU LiDAR Project Leader), and Engr. Jojene R. Santillan (CSU LiDAR 1 Chief SRS).

In the latter part of the workshop, Dr. Enrico Paringit discussed the templates of the various reports that will be jointly generated by the Phil-LiDAR 1 Program and Project Teams, and to be published and shared to the public later on.

Dr. Enrico C. Paringit, Phil-LiDAR 1 Program Leader, giving his closing remarks.

Dr. Enrico C. Paringit, Phil-LiDAR 1 Program Leader, giving his closing remarks.

The IP Workshop ended with a closing remark by Dr. Enrico C. Paringit.

CSU LiDAR 1 participates in the ISPRS Congress 2016 in Prague, Czech Republic, presents 3 papers

Engr. Meriam Makinano-Santillan (Project Leader), Engr. Jojene R. Santillan (Chief Science Research Specialist), and Engr. Arthur M. Amora (Supervising Science Research Specialist) of the CSU Phil-LiDAR 1 project recently attended the XXIII International Society for Photogrammetry and Remote Sensing (ISPRS) Congress that was held in Prague, Czech Republic from July 12-19, 2016. The ISPRS Congress is a quadrennial event organized by ISPRS, a non-governmental organization devoted to the development of international cooperation for the advancement of photogrammetry and remote sensing and their applications. Prior to this event, the congress was last held in 2012 in Melbourne, Australia.

isprs2016_csulidar1

Engrs. Meriam Makinano-Santillan, Jojene R. Santillan, and Arthur M. Amora attended and presented research papers in the XXIII ISPRS Congress 2016 held in Prague, Czech Republic.

This year’s congress was held in the Prague Congress Center, with the theme “From human history to the future with spatial information”. The program structure is split into several session types: Technical Sessions, Theme Sessions, Special sessions, Plenary Meetings, Exhibitor’s Showcase Sessions and Commercial Sessions.

Three (3) research papers discussing some of the major outputs of the CSU Phil-LiDAR 1 Project were presented in the three distinct technical sessions of the congress.

Engr. Arthur M. Amora presented the research paper entitled “Asessing the impacts of floodings caused by extreme rainfall events through a combined geospatial and numerical modeling approach” during the “VIII/Ths 2 – Operational Remote Sensing Application Services 3” technical session held in the afternoon of the second day of the Congress (July 13).

 Engr. Arthur Amora, Supervising Science Research Specialist, presented the research paper entitled "Asessing the impacts of floodings caused by extreme rainfall events through a combined geospatial and numerical modeling approach" during the "VIII/Ths 2 - Operational Remote Sensing Application Services 3" technical session of the XXIII ISPRS Congress 2016 at the Prague Congress Center in Prague, Czech Republic.

Engr. Arthur Amora presenting the research paper entitled “Asessing the impacts of floodings caused by extreme rainfall events through a combined geospatial and numerical modeling approach”.

Engr. Meriam Makinano-Santillan presented the research paper entitled “Academe-local government partnership towards effective application of geospatial technologies for smarter flood disaster management at the local level: an example from Mindanao, Philippines” in the “VIII/1 – Disaster and Risk Reduction 2” technical session during the 3rd day of the Congress (July 14).

isprs2016_meriam

Engr. Meriam Makinano-Santillan presenting the research paper entitled “Academe-local government partnership towards effective application of geospatial technologies for smarter flood disaster management at the local level: an example from Mindanao, Philippines”.

Engr. Jojene R. Santillan  presented the research paper entitled “Vertical accuracy assessment of 30-m resolution ALOS, ASTER, and SRTM global DEMs over northeastern Mindanao, Philippines” in the “IV/3 – Global DEM Interoperability 2” technical session during the 4th day of the Congress (July 15)

isprs2016_jojene

Engr. Jojene R. Santillan presenting the research paper entitled “Vertical accuracy assessment of 30-m resolution ALOS, ASTER, and SRTM global DEMs over northeastern Mindanao, Philippines”.

The full texts of the presented research papers have been published in the International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (ISPRS Archives). The Archives is the series of peer-reviewed proceedings published by the ISPRS, and are listed in the ISI Conference Proceedings Citation Index (CPCI) of the Web of Science, SCOPUS, and the Directory of Open Access Journals (DOAJ). The papers of Engr. Makinano-Santillan and Arthur Amora are published in Volume XLI-B8, while that of Engr. Jojene Santillan was published in Volume XLI-B4.

CSU Phil-LiDAR 1’s participation in the said congress was financially-supported by the Philippines’ Department of Science and Technology (DOST). Engr. Michelle V. Japitana and Mr. Rudolf Joshua Candare of CSU Phil-LiDAR 2 as well as other Philippine-based researchers also attended and presented research papers in the congress.

CSU LiDAR 1 Researchers attended and presented research papers in IGARSS 2016 in Beijing, China

Engr. Ronald M. Makinano and Engr. Linbert C. Cutamora, CSU Phil-LiDAR 1 Supervising Science Research Specialists, and Mr. Edsel Matt O. Morales, CSU Phil-LiDAR 1 Information Technology Officer I, attended and presented research papers at the International Geoscience and Remote Sensing Symposium (IGARSS) 2016 held at China National Convention Center (CNCC), Beijing, China from July 10-15, 2016. IGARSS is annual remote sensing conference organized by the IEEE Geoscience and Remote Sensing Society (GRSS) which provides the ideal forum for scientist, practitioners, and industries, as well as decision makers. The main theme of IGARSS 2016 is “Advancing the understanding of our living planet”. The technical program covers all remote sensing related areas including advances in analysis techniques, applications to land, oceans, atmosphere, environmental sensing, sensors and platforms, data management/education and policy as well as special topics of this year, such as natural hazards and environment pollution, global change, big data in geoscience and interdisciplinary topics.

igarss2016_opening

Opening program of IGARSS 2016.

One of the several parallel activities during the 5-day conference was a technical session on Digital Terrain Models. The session gathered several participants to present and discuss research papers related in assessing, evaluating and improving accuracy and quality of different derived-Digital Elevation Models (DEM).  During this session, Engr. Ronald M. Makinano presented research paper entitled “Vertical Accuracy Assessment of ALOS World 3D-30m Digital Elevation Model over Northeastern Mindanao, Philippines” which was outcome of the CSU Phil-LiDAR 1 project.

makinano_igarss

Engr. Ronald M. Makinano doing a presentation during the ‘Digital Terrain Model’ technical session of IGARSS 2016.

On the last day of the conference in ‘Floods’ technical session in which tackled about different applications related in flooding, Mr. Edsel Matt O. Morales and Engr. Linbert C. Cutamora presented other two research papers which were also outcomes of CSU Phil-LiDAR 1 project. Mr. Edsel Matt O. Morales presented “Near-Real Time Simulation and Geo-Visualization of Flooding in the Philippines’ Deepest Lake”, while Engr. Linbert C. Cutamora presented “Integrating LiDAR and Flood Hazard Simulation Models in Determining Exposure and Vulnerability of Buildings to Extreme Rainfall-Induced Flood Hazards”.

Mr. Edsel Matt O. Morales doing a presentation during the ‘Floods’ technical session of IGARSS 2016.

Mr. Edsel Matt O. Morales doing a presentation during the ‘Floods’ technical session of IGARSS 2016.

Engr. Linbert C. Cutamora doing a presentation during the ‘Floods’ technical session of IGARSS 2016.

Engr. Linbert C. Cutamora doing a presentation during the ‘Floods’ technical session of IGARSS 2016.

The conference was successful, gathering together more than 1,800 participants from different countries and regions in which addressing and understanding related issues, exchange of ideas, obtaining the most-up-to-date information about science and technology of remote sensing.

Engr. Ronald M. Makinano, Engr. Linbert C. Cutamora, and Mr. Edsel Matt O. Morales’ participations to the conference were supported by the DOST through the CSU Phil-LiDAR 1 Project.

CSU Phil-LiDAR 1 participated in the Caraga ICT Council’s Exhibit and Culmination Program

The Phil-LiDAR 1 project of Caraga State University (CSU) participated in the exhibit and culmination program of Caraga ICT (Information and Communications Technology) Council in celebration of ICT month last June 30, 2016 at the Atrium of Robinson’s Place in Butuan City. The program goes with the theme “ICT, Susi sa Kinabukasan” which showcases digital solutions, technology advancement, software and mobile application development as the key for social and economic progress. It was attended by several schools and institutions within Caraga Region.

The project's banner/poster shown during the exhibit

The project’s banner/poster shown during the exhibit

Mr. Elbert S. Moyon pays attention to the student’s queries and answers them.

Mr. Elbert S. Moyon pays attention to the student’s queries and answers them.

Mr. Edsel Matt O. Morales explains Flood EViDEns as the participant listens

Mr. Edsel Matt O. Morales explains Flood EViDEns as the participant listens

The Project sent two personnel namely, Mr. Edsel Matt O. Morales and Mr. Elbert S. Moyon, to exhibit ICT related programs/applications of the project during the said event. They showcased Flood EViDEns (Flood Event Visualization and Damage Estimations) – a web-based application for flood disaster management, in the project’s booth.

Several other project teams of CSU also participated and exhibited in the said event such as the FARMS of the ICT Center and the CLAIMS-GIS and CSU Phil-LIDAR 2 Projects of the College of Engineering and Information Technology.

Assessing the impacts of flooding caused by extreme rainfall events through a combined geospatial and numerical modeling approach

By Jojene R. Santillan, Arthur M. Amora, Meriam Makinano-Santillan, Jennifer T. Marqueso, Linbert C. Cutamora, Jesiree L. Serviano, Ronald M. Makinano

ABSTRACT:

In this paper, we present a combined geospatial and two dimensional (2D) flood modeling approach to assess the impacts of flooding due to extreme rainfall events. We developed and implemented this approach to the Tago River Basin in the province of Surigao del Sur in Mindanao, Philippines, an area which suffered great damage due to flooding caused by Tropical Storms Lingling and Jangmi in the year 2014. The geospatial component of the approach involves extraction of several layers of information such as detailed topography/terrain, man-made features (buildings, roads, bridges) from 1-m spatial resolution LiDAR Digital Surface and Terrain Models (DTM/DSMs), and recent land-cover from Landsat 7 ETM+ and Landsat 8 OLI images. We then used these layers as inputs in developing a Hydrologic Engineering Center Hydrologic Modeling System (HEC HMS)-based hydrologic model, and a hydraulic model based on the 2D module of the latest version of HEC River Analysis System (RAS) to dynamically simulate and map the depth and extent of flooding due to extreme rainfall events. The extreme rainfall events used in the simulation represent 6 hypothetical rainfall events with return periods of 2, 5, 10, 25, 50, and 100 years. For each event, maximum flood depth maps were generated from the simulations, and these maps were further transformed into hazard maps by categorizing the flood depth into low, medium and high hazard levels. Using both the flood hazard maps and the layers of information extracted from remotely-sensed datasets in spatial overlay analysis, we were then able to estimate and assess the impacts of these flooding events to buildings, roads, bridges and landcover. Results of the assessments revealed increase in number of buildings, roads and bridges; and increase in areas of land-cover exposed to various flood hazards as rainfall events become more extreme. The wealth of information generated from the flood impact assessment using the approach can be very useful to the local government units and the concerned communities within Tago River Basin as an aid in determining in an advance manner all those infrastructures (buildings, roads and bridges) and land-cover that can be affected by different extreme rainfall event flood scenarios.

KEYWORDS:  Extreme rainfall, Flooding, Impact assessment, 2D Flood modeling, LiDAR, Landsat


Publication Details/Metadata:

Paper Title: AASSESSING THE IMPACTS OF FLOODING CAUSED BY EXTREME RAINFALL EVENTS THROUGH A COMBINED GEOSPATIAL AND NUMERICAL MODELING APPROACH

Authors: Jojene R. Santillan, Arthur M. Amora, Meriam Makinano-Santillan, Jennifer T. Marqueso, Linbert C. Cutamora, Jesiree L. Serviano, Ronald M. Makinano

Publication Date: 2016

Conference Name/Journal/Book Title: ISPRS – International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Volume: XLI-B8

Pages: 1271-1278

Publisher: International Society for Photogrammetry and Remote Sensing (ISPRS), Copernicus GmbH

Link to Full Text: View/Download from: ISPRS Website or CCGeo.Info Website

Academe-local government partnership towards effective application of geospatial technologies for smarter flood disaster management at the local level: an example from Mindanao, Philippines

By Meriam Makinano-Santillan, Jojene R. Santillan, Edsel Matt O. Morales, Lorie Cris S. Asube, Arthur M. Amora, Linbert C. Cutamora, Ronald. M. Makinano

ABSTRACT:

In this paper, we discuss how an academe-local government partnership can lead the way for the effective use of geospatial technologies for smarter and geospatially-informed decision making before, during, and after a flood disaster. In Jabonga municipality, in the province of Agusan del Norte, in Mindanao, Philippines, two significant flooding events occurred in the year 2014 which were caused by overflowing water bodies due to continuous heavy rains. These flood events inundated populated areas, caused massive evacuation, made roads un-passable, and greatly damaged sources of incomes such as croplands and other agricultural areas. The partnership between Caraga State University and the local government of Jabonga attempts to improve localized flood disaster management through the development of web-based Near-real Time Flood Event Visualization and Damage Estimations (Flood EViDEns) application. Flood EViDENs utilizes LiDAR-derived elevation and information products as well as other elevation datasets, water level records by monitoring stations, flood simulation models, flood hazard maps, and socio-economic datasets (population, household information, etc.), in order to visualize in near-real time the current and future extent of flooding, to disseminate early warnings, and to provide maps and statistics of areas and communities affected and to be affected by flooding. The development of Flood EViDEns as the main product of the partnership is an important application of geospatial technologies that will allow smarter and geospatially-informed decision making before, during, and after a flood disaster in Jabonga.

KEYWORDS:  Geospatial technology, Flood, Disaster management, Academe-local government partnership, Mindanao, Philippines


Publication Details/Metadata:

Paper Title: ACADEME-LOCAL GOVERNMENT PARTNERSHIP TOWARDS EFFECTIVE APPLICATION OF GEOSPATIAL TECHNOLOGIES FOR SMARTER FLOOD DISASTER MANAGEMENT AT THE LOCAL LEVEL: AN EXAMPLE FROM MINDANAO, PHILIPPINES

Authors: Meriam Makinano-Santillan, Jojene R. Santillan, Edsel Matt O. Morales, Lorie Cris S. Asube, Arthur M. Amora, Linbert C. Cutamora, Ronald. M. Makinano

Publication Date: 2016

Conference Name/Journal/Book Title: ISPRS – International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Volume: XLI-B8

Pages: 109-115

Publisher: International Society for Photogrammetry and Remote Sensing (ISPRS), Copernicus GmbH

Link to Full Text: View/Download from: ISPRS Website or CCGeo.Info Website

Vertical accuracy assessment of 30-m resolution ALOS, ASTER, and SRTM global DEMs over northeastern Mindanao, Philippines

By Jojene R. Santillan, Meriam Makinano-Santillan

ABSTRACT:

The ALOS World 3D – 30 m (AW3D30), ASTER Global DEM Version 2 (GDEM2), and SRTM-30 m are Digital Elevation Models (DEMs) that have been made available to the general public free of charge. An important feature of these DEMs is their unprecedented horizontal resolution of 30-m and almost global coverage. The very recent release of these DEMs, particularly AW3D30 and SRTM- 30 m, calls for opportunities for the conduct of localized assessment of the DEM’s quality and accuracy to verify their suitability for a wide range of applications in hydrology, geomorphology, archaelogy, and many others. In this study, we conducted a vertical accuracy assessment of these DEMs by comparing the elevation of 274 control points scattered over various sites in northeastern Mindanao, Philippines. The elevations of these control points (referred to the Mean Sea Level, MSL) were obtained through 3rd order differential levelling using a high precision digital level, and their horizontal positions measured using a global positioning system (GPS) receiver. These control points are representative of five (5) land-cover classes namely brushland (45 points), built-up (32), cultivated areas (97), dense vegetation (74), and grassland (26). Results showed that AW3D30 has the lowest Root Mean Square Error (RMSE) of 5.68 m, followed by SRTM-30 m (RMSE = 8.28 m), and ASTER GDEM2 (RMSE = 11.98 m). While all the three DEMs overestimated the true ground elevations, the mean and standard deviations of the differences in elevations were found to be lower in AW3D30 compared to SRTM-30 m and ASTER GDEM2. The superiority of AW3D30 over the other two DEMS was also found to be consistent even under different landcover types, with AW3D30’s RMSEs ranging from 4.29 m (built-up) to 6.75 m (dense vegetation). For SRTM-30 m, the RMSE ranges from 5.91 m (built-up) to 10.42 m (brushland); for ASTER GDEM2, the RMSE ranges from 9.27 m (brushland) to 14.88 m (dense vegetation). The results of the vertical accuracy assessment suggest that the AW3D30 is more accurate than SRTM-30 m and ASTER GDEM2, at least for the areas considered in this study. On the other hand, the tendencies of the three DEMs to overestimate true ground elevation can be considered an important finding that users of the DEMs in the Philippines should be aware of, and must be considered into decisions regarding use of these data products in various applications.

KEYWORDS:  AW3D30, ASTER GDEM2, SRTM-30m, Digital Elevation Model, Accuracy Assessment, Philippines


Publication Details/Metadata:

Paper Title: VERTICAL ACCURACY ASSESSMENT OF 30-M RESOLUTION ALOS, ASTER, AND SRTM GLOBAL DEMS OVER NORTHEASTERN MINDANAO, PHILIPPINES

Authors: Jojene R. Santillan, Meriam Makinano-Santillan

Publication Date: 2016

Conference Name/Journal/Book Title: ISPRS – International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Volume: XLI-B4

Pages: 149-156

Publisher: International Society of Photogrammetry and Remote Sensing (ISPRS)

Link to Full Text: View/Download from: ISPRS Website or CCGeo.Info Website

CSU Phil-LiDAR 1 attends the 36th ACRS

The 36th Asian Conference on Remote Sensing (2015 ACRS) with the theme “ACRS 2015: Fostering Resilient Growth in Asia”, was held last October 19-23, 2015 at the Crowne Plaza Manila Galleria, Ortigas Business District, Metro Manila, Philippines. The conference was jointly organized by Asian Association on Remote Sensing (AARS) General Secretary— Prof. Kohei Cho, ACRS 2015 Local Organizing Committee Chairman—Dr. Enric C. Paringit and the President of Philippine Geosciences and Remote Sensing Society (PhilGRSS)—Dr. Gay Jane Perez.

The conference aims to bring together students, researchers, scientists, engineers, policy makers, professionals and practitioners from all over Asia. The Conference is an avenue for the participants to discuss technical issues, present diverse array of research papers and studies, exchange ideas and a room for growth. The conference was centered in the discussion of various environmental problems and disasters that have been present in Asia for years. To address these problems, the conference highlighted how Remote Sensing can greatly contribute to the goal of building a resilient community and strengthen the capability of the developed and developing countries in Asia in adapting to change.

Throughout the conference, there were 926 participants and 638 papers presented during the plenary, sub-plenary and technical sessions. Among the participants of the conference were the technical team of CSU Phil-LiDAR 1—Engr. Meriam M. Santillan, Engr. Lorie Cris S. Asube, Engr Jojene R. Santillan, Engr. Arthur M. Amora, Engr. Linbert C. Cutamora, Engr. Ronald M. Makinano, Engr. Jesiree L. Serviano, Engr. Jennifer T. Marqueso, Mr. Edsel Matt O. Morales, Engr. Sherwin P. Pulido, Engr. Melfred Anthony Berdera and Engr. Jared P. Culdora. The following seven research papers of the CSU Phil-LiDAR 1 Team were chosen to be presented:

  • Analyzing the impacts of tropical Storm-Induced Flooding Through Numerical Model Simulations And Geospatial Data Analysis
  • Flood Hazard Mapping Of River Basins In Caraga Region, Mindanao, Philippines Through The CSU Phil-Lidar 1 Project
  • Flood EViDEns: A Web-Based Application For Near-Real Time Flood Event Visualization And Damage Estimations
  • Flood Hazard Mapping Of Mainit-Tubay River Basin, Mindanao, Philippines Using LiDAR And Numerical Models
  • Assessing The Impacts Of Flooding In Tago River Basin, Mindanao, Philippines Through Integration Of High Resolution Elevation Datasets, Landsat Image Analysis, And Numerical Modelling
  • 3D Building GIS Database Generation From LiDAR Data And Free Online Web Maps And Its Application For Flood Hazard Exposure Assessment
  • Near-Real Time Rainfall Monitoring In The Caraga Region, Mindanao, Philippines

Several 5th year BS Geodetic Engineering Students from Caraga State University attended and presented during the conference as well. Amongst these students were Amor L. Gingo, Janice G. Baay, Joy C. Casinginan, Melba Dominique Burdeos, Joymae Jadap, Clarvi May Moran, Alyssa Kaiser Roa, Alvar Sahipa, and Shiela Refamonte.

The conference ended with Engr. Jojene R. Santillan, Engr. Meriam M. Santillan and Mr. Edsel Matt O. Morales receiving the Bronze Award for their web application entitled “Flood EViDEns: A Web-Based Application for Near Real Time Flood Event Visualization and Damage Estimations” which was presented during the Web Contest 5 (WEBCON5). Another pride of Caraga State University was Ms. Joy Casinginan, who was a recipient of the award for Best Poster Presentation Student Award for her paper entitled ‘Combining LiDAR Data, Field Surveys and Hydrologic Modelling Techniques for Drainage System Assessment.”

FLOOD EViDENS: a web-based application for near-real time flood event visualization and damage estimations

By Jojene R. Santillan, Edsel Matt O. Morales, Meriam M. Santillan

ABSTRACT:

The Web-based Near-real Time Flood Event Visualization and Damage Estimations (Flood EViDEns) is an online geo-visualization application developed through the Phil-LiDAR 1 project of Caraga State University. The application is targeted to be utilized by the Local Government Units (LGUs) and communities in the Caraga Region, Mindanao, Philippines to assist them in geospatially informed decision making in times of flood disasters. The application is an amalgamation of web mapping technology, various geospatial datasets including LiDAR-derived elevation and information products, hydro-meteorological data, and flood simulation models to visualize in near-real time the current and possible future extent of flooding and its associated damages to infrastructures. The Flood EViDEns application facilitates the release and utilization of this near-real time flood-related information through a user-friendly front end interface consisting of web map and tables. The application’s back-end consists of computers running flood simulation models and geospatial analysis to dynamically produce (in an automated manner) current and future flood extents, and tabulated information on the structures affected by flooding including hazard types. These outputs are forwarded into a PostgreSQL/PostGIS spatial database where it is accessed by the front end interface for web visualization. The information provided by Flood EViDEns is very important especially to the LGUs and the community as it can increase awareness and responsiveness of the public to the impending flood disaster. Providing this kind of information during a heavy rainfall event is useful as it could assist in preparation for evacuation, in easily identifying areas that need immediate action, in identifying areas that should be avoided, and in estimating the severity of damage to people and infrastructure as flooding progresses.

KEYWORDS: Flood, hazard, visualization, decision support, disaster preparedness


Publication Details/Metadata:

Paper Title: FLOOD EViDENS: A WEB-BASED APPLICATION FOR NEAR-REAL TIME FLOOD EVENT VISUALIZATION AND DAMAGE ESTIMATIONS

Authors: Jojene R. Santillan, Edsel Matt O. Morales, Meriam M. Santillan

Publication Date: 2015

Conference Name/Journal/Book Title: 36th Asian Conference on Remote Sensing 2015 (ACRS 2015): Fostering Resilient Growth in Asia

Volume: 4

Pages: 2655-2664

Publisher: Asian Association on Remote Sensing

Link to Full Text: View/Download


Evaluating the impacts of landcover change to runoff potential of Tubay river basin through the analysis of multitemporal Landsat images

By Sherwin P. Pulido, Meriam Makinano-Santillan, Jojene R. Santillan

ABSTRACT:

When rain hits saturated or impervious ground it begins to flow overland downhill. Based on observations, changes to land cover can influence the velocity of overland flow. Land use patterns, including increases in impermeable surfaces and construction near riparian zones, affect flow patterns. Increased impervious surface in the areas can reduce the time of runoff and increase the peak discharges of stream flow, resulting in large and more frequent incidents of flooding. Land use within the Mainit-Tubay watershed has undergone changes in the past years. This watershed is located in Caraga region in Northeastern part of Mindanao and has a total area of 994.7292 sq. km. The population has increased and with it, an increase in deforestation and impermeable surfaces. This study evaluated the effects of land cover change to the potential runoff that occurred to the watershed during a rainfall event. The researchers generated land cover maps through the analyses of Landsat images acquired in the years 1995, 2001 and 2014. With this, land cover change was analyzed using remote sensing and GIS techniques. The changes detected were further analyzed to relate it to the changes in surface runoff. Rainfall data during Typhoon Agaton and Typhoon Seniang were utilized to generate runoff depth map. Soil data and curve numbers were added to the land cover maps to generate the runoff volume within the area. Then runoff change was determined. The generated land cover change maps and the runoff change were analyze and evaluated to know the potential effects of runoff change as effect of the changes in land cover. As computed, total runoff volume accumulated in year 2001 was reduced by about 90,894 cu. m. compared during the year 1995. However, a significant increase of runoff volume was detected in the year 2014, in which about 384,000 cu. m. difference from the volume in year 2001 was calculated. This change resulted from the increase in built up, barren and water area which has high runoff potential and in the decrease of shrubs and trees area which has low runoff potential.

KEYWORDS: Surface runoff, land cover, watershed, Landsat


Publication Details/Metadata:

Paper Title: EVALUATING THE IMPACTS OF LANDCOVER CHANGE TO RUNOFF POTENTIAL OF TUBAY RIVER BASIN THROUGH THE ANALYSIS OF MULTITEMPORAL LANDSAT IMAGES

Authors: Sherwin P. Pulido, Meriam Makinano-Santillan, Jojene R. Santillan

Publication Date: 2015

Conference Name/Journal/Book Title: 36th Asian Conference on Remote Sensing 2015 (ACRS 2015): Fostering Resilient Growth in Asia

Volume: 5

Pages: 3435-3442

Publisher: Asian Association on Remote Sensing

Link to Full Text: View/Download