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Miyerkules, Agosto 27, 2014

The Perennial Problem of Siltation: Northern and Central Luzon et al, Philippines

Among many other issues, the problems of killer flash floods, destruction of marine ecosystems such as fish kills, deteriorating marine life, low fish farming harvests, red tide, drought - scarcity of water supply, desertification among too many others are often caused by siltation - in many instances coupled with the unchecked deforestation of highlands from where surface runoff water come in large droves during heavy rain.




Sometimes, as in the case in the Mindoro and Ormoc tragedies in the past were countless people lost their lives, compounding the floods are log and debris stampede.





The stampede part is the most lethal particularly when it occurs at the time when people are asleep and have no defense nor countermeasure to rely upon as their physical safety all of a sudden totally goes south.
SiltationFrom Wikipedia, the free encyclopedia 
Siltation is the pollution of water by fine particulate terrestrial clastic material, with a particle size dominated by silt or clay. It refers both to the increased concentration of suspended sediments, and to the increased accumulation (temporary or permanent) of fine sediments on bottoms where they are undesirable. Siltation is most often caused by soil erosion or sediment spill. 
Sometimes siltation is called sediment pollution, although that is an undesirable term since it is ambiguous, and can also be used to refer to a chemical contamination of sediments accumulated on the bottom, or pollutants bound to sediment particles. Siltation is the preferred term for being unambigiuous, even if not entirely stringent since it also includes other particle sizes than silt.
In recent time, while natural causes still figure as a factor in siltation, human-caused siltation-sedimentation has been observed to occur in alarming levels. More impending man-made catastrophes are expected in this sense, for which early solutions are required to at least lessen the future impact of societal and individual losses arising from simple siltation. 

In Europe, marine ecosystems are taken seriously.
Tyne Rivers Trust - Proud Guardians of England's Rivers
Siltation and pressures on river habitats
The problem on global scale
The intensification of agricultural activities is a recognised contributory factor to the current rapid rate of soil erosion on a global scale. As well as being a valuable resource, topsoil also contains nutrients which can negatively alter the balance of freshwater ecosystems. Erosion by rivers is a natural process and the presence of sediment of all sizes is necessary to support healthy freshwater ecosystems. When fine sediment is over-supplied it can infill the spaces between river gravels and pebbles and lead to problems such as the loss in interspatial habitat, binding of polluting molecules and the de-oxygenation of the substrate. Siltation in rivers is intrinsically linked to the erosion of topsoil by wind and rain action but accelerated (we use the term ‘aggravated’) by land use and land management practices.
Read more about this article from here

    Some Related Readings:

    United Nations Sponsored Study on Dams, Siltation (download document in Word format here)







    In relation to fish farming - or aquaculture the following site is recommended:
    Wye and Usk Foundation
    Siltation
    A Wye tributary smothered by sedimentation
    River restoration works helping to trap silt in the bank rather than it damaging gravels
    Silt is a granular material derived from soil or rock of a grain size between sand and clay. It may occur as a soil or as suspended sediment in a surface "water body" (Water Framework Directive speak for river, stream, lake or groundwater source). It may also exist as soil deposited on a river or lake bed. Siltation is very bad news for our rivers and many of their inhabitants. With faster run-offs from forestry, increased grazing pressures and, typically, potato, strawberry or maize crops, fine sediment loads on some streams smother the bed and kill off invertebrates and fish eggs, resulting in reduced spawning success or abandonment by fish. The fine sediment loading of our rivers has trebled since 1980 and in the most severely affected streams egg survival has been reduced to 0%. Much of this damage is avoidable and our knowledge is increasing of the whereabouts of vulnerable sites and which land use practices put the rivers at the greatest risk.
    Following on from more than a decade of leaflet drops and advisory booklets, the "Catchment Sensitive Farming Initiative" aims to mitigate damage in the most vulnerable catchments such as Lugg, Ithon and Garren but it too has the disadvantage of being only voluntary and has limited funding for remedial work. Cross compliance is built into the current grant scheme, whereby grants may be reduced or removed in the event of bad agricultural practices but it lacks the will for enforcement. 
    The Foundation continues to be alert to the damage caused by siltation and fencing out stock remains an absolute priority where it is a problem, as is preventing and repairing erosion. The subsequent restoration of natural widths (i.e. narrower) that result from fencing enable streams to resist more effectively the worst effects of siltation.
    To summarise, silt affects aquatic life is in several ways:
    ·   Spawning gravels become compacted·   Invertebrate types and numbers are reduced·   Acts as a vehicle for certain pesticides and phosphates·   Read more from here













    Miyerkules, Disyembre 18, 2013

    The Global Geohazard System

    Crisis Mapping

    In 2008 we determined to create a full-function Crisis Mapping project. This was borne out of the persistent eruption of hostilities in Southern Philippines between both communist - Islamist groups on one side and the government on the other. Fresh from the experience at confronting an incorrigible troublemaker such as the Juma'a Abu Sayyap, or more popularly known as Abu Sayyaf, we resolved to push stakeholders to join in formulating the Philippine conflicts crisis map.

    This is modeled after the U.S.-Euro academe's successful crime and peacekeeping mapping efforts that had led to wide acceptance and invited broad-based support from as many sectors and as many countries as possible.

    After all, the value of life is such that people and institutions, states and combines will pay as high a price as possible for the safety of both individuals and enclaves of people.

    Supersites (eathquake sites) of the world scientific community has a interactive map showing the areas where big earthquakes are predicted to happen. Click the image to visit Supersites:

    Changed Parameters

    One year later, the entire universe for the crisis mapping project had changed. It cannot be called a drastic change since the new directions fell within range of  long-held advocacies and persistent efforts. We had began such efforts by provoking officials at the Department of National Defense to modernize.

    Among the sources for concepts and ideas of our papers given to the department was an executive formerly engaged as part of a service provider group at a Saudi Arabia military base. The Saudi military and government, thanks to their foreign high-tech service providers in the late 80s were already advanced in the use of GIS, the digitization of all documents, exploiting satellite information among many things.

    With various other inputs from visiting colleagues, the advocacy for a fully functional satellite research, GPS and GIS-ready system was pushed at defense department, the National Security Council and at the Department of Transportation and Communications through the suggestion of the administrative officer of the defense secretary.

    A large number of milestones were achieved in all of these, one of which was the formulation of the 10-year framework for aerospace concerns and civil aviation development in the Philippines. Ultimately this led to the privatization of the Air Transportation Office that is now the more corporate-run Civil Aviation Authority of the Philippines.

    Another is the passing of the enabling law for the National Transport Safety Board - patterned from the NTSB model of the United States. Many other small accomplishments were also made along the way, until the shift of our mindset from conflicts mapping into environmental or geohazards mapping. On both these milestones, a company in the United States was the most instrumental of all and provided all the support needed.

    Hazards Mapping

    That year in 2009 following the terrorist siege at Sulu Province where staff of the International Committee on the Red Cross were abducted by well-connected civilians that turned over the victims to the Juma'a Abu Sayyap for higher stakes in ransom collections, the need for crisis mapping was overshadowed by the critical want for forecasting natural (or even human-made) catastrophes.

    While it cannot be discounted that the fighting vs. terror is a universal concern, that political conflicts leading to war is a serious matter, it had to be conceded that disasters ruled the day. When we were running after the terrorists in Sulu Province, one of the laughable incidents was overrunning several camps of the Abu Sayyap simply because they were watching over the boxing match of Manny Pacquiao. You can never do that in a disaster.

    When strong rains arrived in Sulu, selected Abu Sayyaf terrorists went down from their lairs pretending to be civilians and acted like very well-behaved refugees in the evacuation centers. Thus it was decided, the shift from conflict flashpoints, crisis mapping will be done in favor of geohazards mapping. (In Quezon Province and Mindoro, among other places, the Philippine communists do the same.

    After a considerable number of people died in various disasters in the Philippines, beginning at the time with tropical storm Ketsana (Ondoy), the firm resolve was to transpose all the efforts into a full-scale undertaking to coordinate data, cooperate with neighboring countries on valuable inputs, technology, earth observation, seismologic and volcanology information.

    Most especially also, to come up with the definitive integrated map of the Geohazard System from earth observation and other sources to help guide in providing more accurate, timely and well-founded policy, decisions and execution thereof for the sake of disaster readiness.

    Above all, to be able to provide credible bulletins, advisories and warnings to the public that whether believed by the receiver, are enough for authorities to haul off potential calamity victims to safer grounds - even with the use of benign force.

    This effort in its entirety seeks to define new paradigms and strategies to enhance environmental hazards mitigation and prevent losses from disasters.

    It aims to see to the welfare of populations vulnerable to geohazards such raging flash floods and stampede of debris (Ondoy 2009, Ormoc flash flood 1991, Cagayan de Oro flash floods 2011), powerful storm surges (Yolanda 2013), earthquakes (Bohol 2013, Baguio 1990), volcanoes (Pinatubo 1991), landslides, and tsunamis.

    Global Geohazard System

    There is a need to develop better approaches to mapping the risks and dangers to communities in the Philippines – correlating such risks with hazards in other neighboring or even fairly distant countries that are linked with Philippines within the world geohazard system (WGS) or global geohazard system.

    Like water that seeks its own level, most if not all, geologic and hydrologic risks, among other environmental hazards, have a way of interconnecting - in the sense that the world is chopped up into a whole lot of boundaries while such hazards challenge these boundaries.

    A fault like the Philippine fault might be known to lie across the length of the Philippine archipelago but it is connected to Taiwan in the north and if you further examine the same from the perspective of tectonic plates, you will note that you will reach both ends of the world from different routes just tracing interconnections between the tectonic plates - that all have a bearing on nearly every seismologic activity anywhere in the globe.

    One of the minor reasons for the shift was our discovering that the organizers of the highly valuable 3rd International Geohazards Workshop in 2007 did not invite the Philippines. While other very extensive gatherings were held later where the Philippines was represented, it must be said that the value of that conference by the ESA-NASA et al in Italy cannot be discounted.

    Discussions on earth observation could help Philippine scientists and technology experts as well as network the country's geohazard specialists with the Committee on Earth Observation Satellites that have the ultimate capacity of providing ground penetrating data about seismologic events, or even unnatural potential hydrologic threats, space data on tropical storms, typhoons and so on.

    Call for international cooperation, sharing

    Now that we have firmed up our resolve not to dwell on political crisis and conflicts, we extend our hand as far out in invitation to all members of the scientific community, developers and providers of technology for geohazard mapping, outer space activity specialists, earth observation networks, to help us stage the first international geohazards mapping and environment summit in Manila, Philippines from the first to the second week of December 2014.

    We seek the kind support of CEOS and its member agencies so that all aspects of discussions and working meetings will become more meaningful.

    Our conference site on the web is still under construction at this time, but we hope to have it ready by January 2014. We have brainstormed a set of topics upon which sharing with experts will be done. We invite all those interested to prepare papers closest to their hearts however, without us limiting their breadth of knowledge and experience in their selected areas of expertise.

    We hope to see you in December 2014 in Manila and believe that there is always a way for all kinds of points to connect when the stimuli is present. In our case, the stimuli we can best provide is the best of the best of Filipino hospitality and genius in improvisations.

    Acknowledgments:

    Some, but not all of those that gave us inspiration and support for this undertaking are most heartily thanked for whatever contributions were obtained from them, in one way or another. These institutions are listed below, not in any kind of order. We will provide a more complete list during the conference proper in 2014.
    Saudi Arabia Royal Air Force, Ministry of Defence

    Themes:

    Huwebes, Disyembre 5, 2013

    Letter to the UN Secretary General on 2014 Summit

    Open Letter to the United Nations


    December 1, 2013

    HIS EXCELLENCY
    BAN KI MOON
    Secretary General
    The United Nations
    UN Headquarters
    First Avenue at 46th Street
    New York, NY 10017
    USA


    Dearest Secretary General Ban:


    Our warmest greetings!

    Since our initial advocacy in 2009 following Ketsana, a large number of catastrophes have already occurred around the world. In most of these disasters, a large number of people say nothing could have been done. No one can predict calamity. The most recent is tropical cyclone Haiyan aka Yolanda of which no less than five thousand could have survived, had our original intention to hold a conference on mapping and building a decently sized GIS on topics related to disasters and for better forecasting.


    Out of this advocacy we determined to hold a hazards mapping and environment summit in April 2010 and held back the plan due to unforeseen causes.

    We have decided to discard our plan to have our original sponsors support the event and to depend upon Philippine leaders for supporting the event to its completion. In light of the holding of the Third World Conference on Disaster Risk Reduction in Sendai, Japan in March 2015, we propose to hold the hazards mapping conference in Manila from 8:00 AM December 4, 2014 up to 3: PM December 12, 2014 to be culminated with a benefit event at the end of the conference. We envision that the hazards mapping will enhance the 2015 World Conference.

    May we respectfully invite the United Nations to be our primary and principal partner for this private-led event. We hope for your soonest assent and affirmation of positive determination.

    Thank you very much.

    Faithfully yours,

    HMES