From: Waterworld
By Rozali Ismail
WATER scarcity and the threat to water sources are issues that must be dealt with urgently to ensure the survival of future generations, writes ROZALI ISMAIL.
TAKING water for granted threatens the very existence of human survival. The "care-less" attitude we have today may some day pose greater harm and danger to our survival as a human race, even greater than wars among nations.
With recent events around the world resulting from climate change, global warming, environmental degradation and rising ecological disasters, water becomes even more priceless.
With climate change causing sea levels to rise, coastal communities could lose up to 50 per cent more of their freshwater supplies than previously thought, according to a study by Ohio State University in the United States.
Hydrologists have simulated how saltwater will intrude into freshwater aquifers, given the sea level rise predicted by the Intergovernmental Panel on Climate Change (IPCC). The IPCC has concluded that within the next 100 years, sea levels could rise as much as 58cm, flooding coasts worldwide.
Seeing that climate change is already diminishing freshwater resources, with changes in rainfall patterns and the melting of glaciers, scientists are trying to point out ways that climate change can potentially reduce available drinking water. This is because most people are probably aware of the damage that rising sea levels can do above ground, but not underground, which is where the fresh water is.
Depending on the texture of the sand along the coastlines, salt water can penetrate 50 per cent further inland underground than it does above ground. And when salt water and fresh water meet, they mix in complex ways. Between the incoming salt water and the inland fresh water, a pool of brackish water forms. Like salt water, brackish water is not safe to drink because it causes dehydration. Only water that contains less than 250mg of salt per litre is considered fresh water and safe to drink.
Almost 40 per cent of the world population lives in coastal areas, less than 60km from the shoreline. These regions may face more loss of freshwater resources than scientists originally forecast.
It is estimated that 1.5 billion of Asia's total population of four billion live within 100km of the sea and 60 per cent live within 400km of a coast.
Malaysia has a total coastline of 4,675km, with 2,068km in Peninsular Malaysia and 2,607km in Sabah and Sarawak. Currently, rising waters due to the heavy monsoon season cause severe damage every year to the population along the eastern coast of the peninsula, what more if sea levels continue to rise.
It is natural for humans to develop and improve their standard of living. In the economic sense, development has manifested itself in industrial and commercial progress. In developed and developing countries, this has led to the inevitable clash between man and nature.
Globally, every year, roughly 450 cubic kilometres of waste water is discharged into rivers and lakes. To dilute and transport this unclean water, before it can be used again, another 6,000 cubic kilometres of clean water is needed, an amount equal to about two- thirds of the world's total annual useable fresh water runoff.
Population growth and rising demand per capita are creating water shortages in many countries. Internationally, the annual population increase of nearly 80 million per year implies an increased demand for fresh water of about 64 billion cubic metres a year.
Currently, 206 million Africans live in water-stressed or water- scarce countries. By 2025, the population will increase to about 700 million. Of these, 440 million will live in countries with acute water scarcity of less than 1,000 cubic metres per person per year.
The amount of water that people use depends not only on basic needs and how much water is available but also on levels of urbanisation and economic development. Withdrawals of water have grown to meet demand for all types of use, for irrigated agriculture, industry and household purposes. As the world continues to urbanise at rapid rates, the demand for drinkable water for household use is expected to soar, outpacing the capacity of most cities to provide it.
China, for example, has 22 per cent of the world's population but only seven per cent of all freshwater runoff. Currently, China's freshwater supplies have been estimated to be capable of supporting 650 million people only on a sustainable basis, which is half of the country's population.
While projections are not predictions, these figures point to the need for urgent attention to issues of stabilising population growth, using water resources sustainably and preserving freshwater supplies from additional degradation.
Critically, fresh water can be managed for the benefit of current and future generations, but only if concerted efforts can be made by national governments, the international community and individuals, acting together towards a common set of objectives.
Governments can develop national water management policies that help not only to improve supply but also manage demand better. Key strategies include regulation of water depending on its end-use, watershed management and appropriate pricing, for example ending inefficient water subsidies that in effect encourage overuse. There are also huge inequalities in the amount spent on improving services to the better-off sections of urban society compared with the investments in basic services for the urban poor.
Ultimately, governments in water-short regions will have to come to terms with acute fresh water shortages and accommodate human needs without overusing or polluting freshwater resources.
As individuals, fortunately, there are lots of things we can do to save our fresh water. One of them is to use earth-friendly household products. Many companies are getting on board right now and making earth-friendly cleaning products, detergents and dishwasher soap that are safe for our environment.
In an effort to spur action from the governments of the world and the global citizens to meet the impending crisis, the United Nations General Assembly has proclaimed the period from 2005 to 2015 as the International Decade for Action, "Water for Life".
Every year on March 22, World Water Day is celebrated to remind us that the supply of water is finite and that it is badly needed. Without fresh water, the planet would be a barren wasteland. Let us remember this crucial day for our generations to come. Let us reflect and ponder on what we have done and what we can do now. Since water is essential to our survival, let us give water the value and respect it deserves.
* Tan Sri Rozali Ismail is executive chairman of Syarikat Bekalan Air Selangor Sdn Bhd
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