[Philippines] Catchment susceptibility to hydrometeorological events: sediment flux and geomorphic change as drivers of flood risk in the Philippines
[菲律宾] 流域对水文气象事件的敏感性:泥沙通量和地貌变化是菲律宾洪水风险的驱动因素
基本信息
- 批准号:NE/S003312/1
- 负责人:
- 金额:$ 53.31万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2018
- 资助国家:英国
- 起止时间:2018 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
River morphology results from sediment transport and sedimentation, which are both a consequence of water flow. Episodic variation in natural (e.g. typhoons, earthquakes, volcanoes) and anthropogenic (e.g. gravel mining, river bank protection) sediment supply drives changes in riverbed levels and sedimentology. These changes determine channel capacity and flow routing, and thus associated flood risk to people and property. The same factors determine variations in lateral bank erosion rates; elevated rates result in the loss of developed floodplain and the failure of critical infrastructure such as road bridges. Despite the significance of variation in riverbed levels and channel position for flood risk, geomorphological processes are commonly overlooked in flood risk mapping. In the Philippines, rivers are particularly dynamic; risks arising from sedimentation and erosion need to be assessed and incorporated into flood risk management to mitigate the impact of flooding on welfare and the economy. This project aims to: (i) develop a national-scale catchment characteristics database, and associated river geometry relations, to assess the susceptibility of different catchments to morphological change impacts on flood hazard; and (ii) assess flood hazards arising from morphological change associated with variations in sediment supply and the influence of lateral constraints on channel morphological adjustment. To achieve the first aim we will use national scale topographic models and repeat satellite imagery to assess fluvial and landscape characteristics to identify indicators of enhanced channel mobility and sediment transport, with outputs available from a river centreline Geographic Information System with data points every 1 km along the Philippines river network. This national scale dataset will be used by project partners to assess and plan infrastructure developments. To achieve the second aim we will generate repeat, high-resolution Digital Elevation Models (DEMs) of the Pinacanauan de Ilagan River and the Bacarra Rivers, from airborne Light Detection and Ranging (LiDAR) and bathymetric surveys. We will difference these DEMs to map patterns of erosion and deposition during a wet season, and calculate a sediment budget for each river. The DEMs and sediment budget will then be used to parameterise and assess hydro- and morpho-dynamic models that will be used to investigate changes in flood risk due to morphological change. This framework will be used, by project partners, to guide river and flood management in the Pinacanauan de Ilagan and the Bacarra catchments. The framework will also be transferable to other rivers in the Philippines, and farther afield in SE Asia and beyond.This proposal forges a partnership between the University of the Philippines (UP) Diliman, the University of Glasgow, four Filipino project partners, and project partner Prof Brierley (University of Auckland). Specifically, the Philippine project partners are: the Mines and Geosciences Bureau; the Department of Public Works and Highways; and two Local Government Units in the study catchments, namely City of Ilagan and Municipality of Vintar. The project brings together UP Diliman's expertise in geomatics with the University of Glasgow's expertise in fluvial geomorphology and numerical modelling, to undertake research that will shed light on the morphodynamics of tropical rivers and produce tools that will be used for sustainable fluvial flood management in the Philippines.
河流的形态是由泥沙输移和沉积作用造成的,而泥沙输移和沉积作用都是水流的结果。自然(如台风,地震,火山)和人为(如砾石开采,河岸保护)沉积物供应的阶段性变化驱动河床水位和沉积学的变化。这些变化决定了河道容量和流量路由,从而对人员和财产造成相关的洪水风险。同样的因素决定了横向河岸侵蚀速率的变化;速率升高导致已开发洪泛区的损失和公路桥梁等关键基础设施的失效。尽管河床水位和河道位置的变化对洪水风险具有重要意义,但在洪水风险图绘制中,地貌过程通常被忽视。在菲律宾,河流特别活跃;需要评估沉积和侵蚀造成的风险,并将其纳入洪水风险管理,以减轻洪水对福利和经济的影响。该项目旨在:(i)建立一个全国性的集水区特征数据库,以及相关的河流几何关系,以评估不同集水区对形态变化对洪水灾害影响的敏感性;以及(ii)评估与沉积物供应变化相关的形态变化所引起的洪水灾害,以及横向限制对河道形态调整的影响。为了实现第一个目标,我们将使用国家尺度的地形模型和重复卫星图像来评估河流和景观特征,以确定增强的通道流动性和沉积物运输的指标,从河流中心线地理信息系统的输出数据点,每1公里沿菲律宾河流网络沿着。项目合作伙伴将使用这一全国规模的数据集来评估和规划基础设施的发展。为了实现第二个目标,我们将产生重复的,高分辨率的数字高程模型(DEM)的Pinacanauan德伊拉甘河和巴卡拉河,从机载光探测和测距(LiDAR)和测深调查。我们将区分这些DEM,以绘制雨季侵蚀和沉积的模式,并计算每条河流的沉积物预算。DEM和沉积物预算,然后将用于参数化和评估水文和形态动力学模型,将用于调查洪水风险的变化,由于形态的变化。该框架将被项目合作伙伴用于指导Pinacanauan de伊拉甘和Bacarra流域的河流和洪水管理。该框架也将转移到菲律宾的其他河流,并在东南亚和更远的地方。这一建议锻造菲律宾大学(UP)Diliman,格拉斯哥大学,四个菲律宾项目合作伙伴和项目合作伙伴Brierley教授(奥克兰大学)之间的伙伴关系。具体而言,菲律宾的项目合作伙伴是:矿业和地球科学局;公共工程和公路部;以及研究集水区的两个地方政府单位,即伊拉甘市和文塔尔市。该项目汇集了UP Diliman在地理信息学方面的专业知识与格拉斯哥大学在河流地貌学和数值建模方面的专业知识,进行研究,将揭示热带河流的形态动力学,并产生将用于菲律宾可持续河流洪水管理的工具。
项目成果
期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Detecting and quantifying morphological change in tropical rivers using Google Earth Engine and image analysis techniques
使用 Google Earth Engine 和图像分析技术检测和量化热带河流的形态变化
- DOI:
- 发表时间:2020
- 期刊:
- 影响因子:0
- 作者:Boothroyd R.J.
- 通讯作者:Boothroyd R.J.
The dark art of interpretation in geomorphology
- DOI:10.1016/j.geomorph.2021.107870
- 发表时间:2021-07-28
- 期刊:
- 影响因子:3.9
- 作者:Brierley, Gary;Fryirs, Kirstie;Williams, Richard
- 通讯作者:Williams, Richard
National-scale assessment of river migration at critical bridge infrastructure in the Philippines using Google Earth Engine
使用 Google Earth Engine 对菲律宾关键桥梁基础设施的河流迁移进行全国范围的评估
- DOI:10.5194/egusphere-egu21-3049
- 发表时间:2021
- 期刊:
- 影响因子:0
- 作者:Boothroyd R
- 通讯作者:Boothroyd R
National-scale geodatabase of catchment characteristics in the Philippines for river management applications.
菲律宾的河流管理应用程序集水特征的国家尺度地理数据库。
- DOI:10.1371/journal.pone.0281933
- 发表时间:2023
- 期刊:
- 影响因子:3.7
- 作者:
- 通讯作者:
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Richard David Williams其他文献
Richard David Williams的其他文献
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{{ truncateString('Richard David Williams', 18)}}的其他基金
Philippine Mining at the National to Catchment Scale: from Legacy Impacts to Sustainable Futures
菲律宾从国家到流域规模的采矿业:从遗留影响到可持续未来
- 批准号:
NE/W000482/1 - 财政年份:2021
- 资助金额:
$ 53.31万 - 项目类别:
Research Grant
PAMANA: Philippine Mining at the National to Catchment Scale - from Legacy Impacts to Sustainable Futures
PAMANA:从国家到流域规模的菲律宾采矿业 - 从遗留影响到可持续未来
- 批准号:
NE/W006871/1 - 财政年份:2021
- 资助金额:
$ 53.31万 - 项目类别:
Research Grant
Decision support framework to incorporate river bank stability in pipeline crossing risk assessment
将河岸稳定性纳入管道穿越风险评估的决策支持框架
- 批准号:
NE/P008984/1 - 财政年份:2017
- 资助金额:
$ 53.31万 - 项目类别:
Research Grant
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