Urban Water Pricing: The Metro Manila and Metro Cebu Cases

Water is a critical commodity for human survival and a scarce resource that must be appropriately priced to ensure that it is not wastefully and unsuitably consumed. This Notes offers an optimal pricing scheme, together with suggestions on the improvement of the overall water resource management that could provide the proper environment by which such pricing scheme can succeed.urban management, water sector, water demand

Estudios sobre la operación y seguridad del Sistema de Embalses de Valdesia: Second technical report: Hydrological studies. Volumen I

1 recurso en línea (676 páginas): pdfContains appendices. References: pages 424.The study on the operational management of the Valdesia system reported in a series of volumes including this one, involved several interrelated areas. This volume reports in detail the basic hydrologic studies including rainfall-runoff modeling, flood forecasting and stochastic data generation which are essential components of the entire study. The products reported I this volume are used for developing emergency and normal operation plans for the Valdesia system.El estudio sobre la gestión operativa del sistema Valdesia reportado en una serie de volúmenes, incluido este, involucró varias áreas interrelacionadas. Este volumen informa en detalle los estudios hidrológicos básicos, incluido el modelado de lluvia-escorrentía, el pronóstico de inundaciones y la generación de datos estocásticos, que son componentes esenciales de todo el estudio. Los productos reportados en este volumen se utilizan para desarrollar planes de operación normal y de emergencia para el sistema Valdesia

Hydrology and ecology-related aspects of managing the Agusan marsh

This paper presents the basin hydrology of Agusan Marsh and the Agusan River Basin. Also presented are basic considerations in the management of the Agusan River Basin environment and discussions on the interaction of hydrology, geomorphology and ecology. In the last few years, there have been interest and plans for water resources developments in the Agusan River Basin. The paper likewise discusses the implications and impacts of these developments on the hydrology, geomorphology and ecology of Agusan Marsh and Agusan River Basin

Intoduction

Introduciton to report by IHP Regional Steering Committee for South East Asia and the Pacific, November, 2008 - Asian Pacific FRIEND: Rainfall Intensity Duration Frequency (IDF); analysis for the Asia Pacific Region / T. M. Daniell and G. Q. Tabios III(eds.), Ch. 1, 1p.Trevor Daniell and Guillermo Q. Tabios II

Summary and Discussion

Chapter of report by IHP Regional Steering Committee for South East Asia and the Pacific, November, 2008 - Asian Pacific FRIEND: Rainfall Intensity Duration Frequency (IDF); analysis for the Asia Pacific Region / T. M. Daniell and G. Q. Tabios III(eds.), Ch. 11, pp. 109-110Trevor M. Daniell and Guillermo Q. Tabios II

Groundwater Supply in Metro Manila: Distribution, Environmental and Economic Assessment

Early studies on the groundwater supply of Metro Manila have indicated inefficient resource use that could lead to the eventual decline in the groundwater level, salt water intrusion, and other similar negative externalities. Based on the preceding premise, the paper intends to present a review and assessment of how groundwater resources are developed and utilized in Metro Manila. The study has evaluated technical reports and published literature. It has also adopted water balance models as well as Long-Run Marginal Cost methodologies in calculating the groundwater potential and cost of groundwater pumping. Through these methodologies, the study requires the incorporation of environmental externalities in valuing the unit cost of groundwater extraction. Specific suggestions concerning monitoring systems, aquifer characterization, Geographic Information System application, environmental costs of groundwater pumping, and policy enforcement have been raised. The paper identifies the need to refine the methodology and data set for instituting both supply and demand relationships and projections.natural resources and environment, water sector

Metro Manila and Metro Cebu Groundwater Assessment

This paper describes the methodologies adopted and the results obtained in assessing the groundwater resources of Metro Manila and Metro Cebu. Also some early and recent studies on the aquifer systems in the two metropolis are presented to draw some comparisons on the assessment and data acquisition methods and identify some gaps involved and the improvements needed. Some of the indicators used in assessing groundwater potential and associated problems include storage coefficient, transmissivity, safe yield, and salt water intrusion. The complex and expensive nature of actual field monitoring and analysis has encouraged the use of mathematical models in this study. Specifically, models adopted by NHRC and JICA were used and their respective capabilities, data requirements and modeling results for water balance are described. Although the two models have specific inputs unique to each model and the NHRC model used secondary 9 year data (i.e. 1982-1990) while JICA used one-year actual data (1990), the models gave similar results as far as recharge to groundwater and piezometric heads are concerned. It was found that Metro Manila gets an annual recharge of 206 MCM which is basically due to the high rainfall events during the wet season. Inflows from Laguna lake and leakage from MWSS distribution systems have been also identified as contributors to the recharge. It was also found that due to the over pumping of wells in some coastal areas in Metro Manila, sea water intrusion of aquifers is now becoming a serious problem. The same holds true in Metro Cebu where water for all types of uses comes from groundwater. That is why the annual recharge from rainfall to the aquifer of the Maghaway valley in Cebu amounting to be 1.4 MCM plus an additional inflow of 1.1 MCM coming from riverbeds, are believed to be insufficient to cover the increasing demand for water from all sectors of the society. It is envisioned that a regional scale groundwater and environmental planning scheme for the two metropolis needs to be developed by linking the models with GIS so groundwater data base maps can be overlaid with land use, management practices, recharge distribution and mass loadings of chemicals. A follow-up study which will incorporate this methodology will provide a useful management tool for developing water resources on a regional scale.natural resources and environment, water sector