Tag Archives: 36th Asian Conference on Remote Sensing 2015 (ACRS 2015)

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


Understanding the impacts of storm induced flooding at the local level through flood modelling with SAR DEM, Lidar DTM & DSM, HEC HMS and HEC RAS

By Amor L. Gingo, Meriam Makinano-Santillan, Jojene R. Santillan

ABSTRACT:

Flooding has long been considered to be one of the deadliest natural disasters. In large river basins, flooding can submerge a whole city and cause irreparable damage to human lives and properties. The same can be said at the local level where a small creek can submerge a whole barangay, especially if the creek receives large volume of water from the upstream that are beyond its capacity. In this paper, we analyzed the physical impacts of flooding caused by the overflowing of Lemon Creek to the surrounding local community in Butuan City, Philippines. The physical impacts were analyzed in terms of flood depth and inundation extent during heavy rainfall caused by tropical storms/typhoons. In this study, we focused on the flooding impacts of Tropical Storm Agaton (January2014) and Seniang (December 2014). First, we developed a HEC HMS based hydrological model of the Lemon Creek watershed to determine the volume of water flowing into the creek during the storm durations. The HEC HMS model was developed using a 10m SAR DEM for watershed and stream delineation and a Landsat 8 OLI image for land cover parameter derivation. Discharge measurements were used to calibrate and validate the model. Then, we developed a HEC RAS model to simulate the overflowing of the creek during the storm events, with the HEC HMS simulated discharge hydrographs as inputs. A 1m resolution LiDAR Digital Terrain Model (DTM) acquired before the storms was used in generating the geometrical parameters of the HEC RAS model, and as input in the flood depth and inundation mapping. Results of the integrated HEC HMS HEC RAS flood modeling showed the extent of flooding during Agaton and Seniang. Using location of structures digitized from a LiDAR Digital Surface Model (DSM), the severity of the impacts of flooding to the local community was determined by counting the number of structures inundated during the onslaught of the tropical storms.

KEYWORDS: localized flooding, impacts, LiDAR, HEC HMS, HEC RAS


Publication Details/Metadata:

Paper Title: UNDERSTANDING THE IMPACTS OF STORM INDUCED FLOODING AT THE LOCAL LEVEL THROUGH FLOOD MODELLING WITH SAR DEM, LIDAR DTM & DSM, HEC HMS AND HEC RAS

Authors: Amor L. Gingo, 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: 3443-3451

Publisher: Asian Association on Remote Sensing

Link to Full Text: View/Download


Near-real time rainfall monitoring in the Caraga region, Mindanao, Philippines using openlayers api and javascript

By Edsel Matt O. Morales, Jojene R. Santillan, Meriam Makinano-Santillan

ABSTRACT:

We developed an online tool for near-real time monitoring of rainfall intensity and accumulated rainfall in various localities in the Caraga Region, Mindanao, Philippines. The web map interface was built using Openlayers API where the locations of all rain gauge stations installed by ASTI DOST are plotted. For each station, a JavaScript is used to extract and analyze 24-hour rainfall data from the ASTI DOST. Based on extracted data, the current rainfall intensity at each rain gauge location is plotted on the web map according to a color scheme that signifies no rainfall, light, moderate, heavy, intense, and torrential rainfall intensities. Clicking on the points of a rain gauge will also show a graph of the rainfall intensities and accumulated rainfall in the last 24 hours. The application is available at http://rainmonitoring.csulidar1.ccgeo.info which can be utilized by Local Government Units (LGUs) and residents of Caraga Region, for rapid rainfall monitoring and as a tool for flood disaster preparedness.

KEYWORDS: rainfall monitoring, Caraga Region, flood early warning, OpenLayers API, Javascript


Publication Details/Metadata:

Paper Title: NEAR-REAL TIME RAINFALL MONITORING IN THE CARAGA REGION, MINDANAO, PHILIPPINES USING OPENLAYERS API AND JAVASCRIPT

Authors: Edsel Matt O. Morales, Jojene R. Santillan, Meriam Makinano-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: 2677-2682

Publisher: Asian Association on Remote Sensing

Link to Full Text: View/Download