RS-GIS Study on Philippine Disasters and Their Restoration

菲律宾自然灾害调查项目是在考虑到菲律宾发生的大量自然灾害及其造成的严重破坏后提出的。INCEDE邀请菲律宾大学、菲律宾大气地球物理和天文服务管理局(PAGASA)、菲律宾国家测绘和资源信息局(NAMRIA)的研究人员参与该项目。在菲律宾举行的第一次会议上，减轻洪水灾害被确定为研究的重点领域。减轻洪水灾害需要洪水预报，并确定涉及的风险。如果有较长时期的实测降雨量和河流流量，可以使用概念性数学模型来预测洪水并将其与风险联系起来。但是，如果没有足够的观测值，或者如果在校准…期间汇流特性发生了很大变化，则此方法不起作用这两个因素在菲律宾都很常见。因此，决定建立一个基于物理的分布式水文模型，并将其应用于选定的流域，然后利用其结果开发用于业务目的的无资料流域的简化数学模型。在项目期间，INCEDE建立了两个水文模型，一个完全分布式模型和一个基于物理的集总模型。来自国家水力研究中心(UP)的一名研究人员访问了INCEDE，参与建立了阿格诺河流域的模型。由数字高程组成的地理信息系统。建立了流域模型、SPOT卫星影像(及其衍生的土地利用)、土壤图、人口分布和公路网。在该项目期间，12名菲律宾研究人员18次应邀到日本参加讨论、研讨会和实地考察。模型应用在模拟过去的洪水中取得了良好的效果。可以将地理信息系统与模拟模型中的洪水预报结合使用，以得出减灾策略。包括地理信息系统和模型在内的结果将在适当的时候移交给菲律宾同行。较少

The project on investigations of natural disasters in the Philippines was proposed by INCEDE considering the large amount of natural disasters experienced in the Philippines and the heavy damage they cause. INCEDE invited researchers from the University of Philippines, Philippines Atmospheric Geophysical and Astronomical Services Administration (PAGASA), Philippine's National Mapping and Resources Information Authority (NAMRIA), to participate in the project. During the first meetings held in the Philippines, flood disaster mitigation was identified as the focus area of the research.Flood disaster mitigation requires flood forecasting, and identifying the risk involved. If measured rainfall and river discharge for a long period are available, conceptual mathematical models can be used to forecast flood and relate it to the risk. However, this approach does not work if there are not enough observations, or if the catchment characteristics change very much during the period of calibratio … More n. Both of these factors are common in the Philippines. Therefore, it was decided to construct and apply a Physically based distributed hydrologic model to a selected catchment, and then to use the results to develop a simplified mathematical model for ungauged catchments for operational purposesDuring the project, two hydrological models, a fully distributed model and a physically based lumped model, were constructed at INCEDE.Agno Catchment in the Luzon island was selected as the study area, and PAGASA carried out hydrologic data compilation while NAMRIA carried out digitizing work to construct the GIS.for the Agno River Basin. A researcher from the National Hydraulic Research Center (UP), visited INCEDE to participate in setting up the model for the Agno river basin. A GIS consisting of Digital Elevation. Model of the basin, SPOT satellite images (and landuse derived from it), soil map, population distribution and the road network was constructed. During the project 12 Philippine researchers have been invited 18 times to Japan to participate in discussions, workshops and field visits.The model application showed good results in simulating past floods. The GIS can be used together with the flood forecasts from the simulation model to arrive at disaster mitigation strategies. The resuls including GIS and models will be handed over to Philippine counterparts in due course. Less