HOW TO MINIMIZE FLOODING IN CENTRAL LUZON AND THE MARIKINA VALLEY AND METRO MANILA

August 21st, 2013 7 Comments   Posted in Dam water release

HOW TO MINIMIZE FLOODING IN CENTRAL LUZON AND THE MARIKINA VALLEY AND METRO MANILA

The San Roque Dam was designed for a 50-year return flood frequency. Since Typhoon Ondoy and Peping were of the order to a 75-100 year flood, it is thus imperative to lower the dam rule curve by 4-5 meters which is the equivalent of 1 major storm. Please note that it took 6 typhoons to fill up the San Roque Dam to its operating level to provide both power and irrigation during summer. More »

Pre-emptive Discharge of Dam Water – A must even in TVA

December 10th, 2011 No Comments   Posted in Dam water release

TVA opens spill gates of all nine dams in Tennessee River system

(from Dec 8 – McClatchy-Tribune Regional News – Suzanna McCloskey The Knoxville News-Sentinel, Tenn.)

 

 The author of this blog is gratified to know that even the renowed US TVA practices pre-emptive discharge of excess dam water in order to provide sufficent ulage to contain an incoming storm or exceptional rainfall or run-off arising from non-absorptive capability of vegetation during certain periods of the year, thus avoiding the need for catastrophic releases of excess dam water during peak rainfall and run-off. More »

Need to lower the Dam Rule Curve to allow for at least ullage for 1-2 storms

September 29th, 2011 1 Comment   Posted in Dam water release
 
With the series of storms battering the Philippines, it is now necessary to do pre-emptive discharge of excess dam water in order to avoid catastrophic release from dams equipped with spillways, as against the over-flow dams which have no control. More »

How to predict timing and quantity of pre-emptive safe discharge – a dam simulation model

November 14th, 2009 No Comments   Posted in environmental impacts

How to predict timing and quantity of pre-emptive safe discharge – a dam simulation model

THIS IS IT!  As the saying goes, a dam simulation model that could be easily implemented and calibrated with actual rainfall and river gauging data and compared with actual power generation and spillway discharge to predict dam height and dam water volume is now available to government agencies, dam operators, dam designers and ordinary laymen.  Please write the author for arrangements on how to secure this state-of-the-art dam simulation model. More »

How to help your government and people solve life-threatening and property-damaging events

November 6th, 2009 No Comments   Posted in environmental impacts

How to help your government and people solve life-threatening and property-damaging events

As a sequel to my earlier blog on “how to predict pre-emptive safe discharge of dam water in anticipation of an incoming storm”, allow me to share my own findings, conclusions and recommendations in order that authorities could formulate a workable and acceptable plan for all the stakeholders in charge of operating and managing dams as well as the affected residents situated at the downstream communities.

This is my own little way of sharing my knowledge, expertise and experience to help my government and country overcome the recurring problem of devastating flooding during the typhoon season. More »

How to Plan Ahead for a Dam Failure – US FEMA guidelines

October 17th, 2009 No Comments   Posted in environmental impacts

How to Plan Ahead for a Dam Failure – US FEMA guidelines

[This article is being provided by Marcial Ocampo as a guide to NAPOCOR, PAGASA, NDCC, LGUs and dam operators for an effective response in the event that a catastrophic failure of a dam is imminent or has occurred.  Currently, an inter-agency committee has been constituted to review and submit by November 30, 2009 a revised DAM RELEASE PROTOCOL to avoid the very recent catastrophic release of excess water by five dams at the height of two super typhoons that inundated and damaged large areas of central and northern Luzon, Philippines. The links has been obtained thru Internet search using the search engine of MSN.  Cheers.  Marcial]

The following article from US FEMA provides the important links for all topics related to planning ahead for a dam failure.  It is the author’s view that all concerned shall be well informed in advance on a DAM OPERATION PROTOCOL in order to avoid dam failure as a result of excessive rainfall that could not anymore be safely stored by a dam.

As a preparatory document, the reader is advised to read a glossary or list of definitions related to dam operations in order to fully appreciate the contents of the links shown below.  The two links are as follow: More »

US Federal Guidelines for Dam Safety: Glossary of Terms (FEMA 148)

October 17th, 2009 8 Comments   Posted in environmental impacts

US Federal Guidelines for Dam Safety: Glossary of Terms (FEMA 148)

[This US Federal Guidelines for Dam Safety is being presented by Marcial T. Ocampo, former Executive Director of PCIERD-DOST to the inter-agency technical committee tasked to review the DAM OPERATION PROTOCOL to be followed by NAPOCOR, PAGASA and other dam operators in the Philippines with the end in view of avoiding the tragic mistake of releasing dam water at the height of the typhoon in order to prevent the dam from collapsing.  The general idea is to drain the dam in advance of approaching typhoon in order to have sufficient storage capacity to store the anticipated rainfall based on weather satellite or “Doppler Radar” measurements as they may become available in the future. This document was obtained by Marcial Ocampo using the internet search engine of MSN.]

The complete link to this document is shown below:

http://www.fema.gov/plan/prevent/damfailure/fema148.shtm More »