View Full Version : Water Scarcity Problems in Cambodia


SeeMacau
August 26th, 2010, 05:13 PM
IRINnews.org

CAMBODIA: Record low water levels threaten livelihoods

Fishing is a major source of livelihood along the Mekong
Photo: Shamsuddin Ahmed/IRI
http://pictures.irinnews.org/images/2008/200809097.jpg

Female farmers hand treshing rice in Cambodia
Photo: Harry Nesbitt/IRRI
http://www.irinnews.org/images/2010/201008260630490938.jpg

PHNOM PENH, 26 August 2010 (IRIN) - Late rains and record low water levels in Cambodia's two main fresh water systems will affect food security and the livelihoods of millions, government officials and NGOs warn.

"We expect the impact to be very strong," said Nao Thuok, director of the Fisheries Administration, adding that low water levels along the Mekong and Tonle Sap rivers were already limiting fish production and migration.

Crucial spawning grounds in floodplains along the rivers remained dry. "The places where the fish usually lay their eggs do not have much water so the fish population will decrease a lot," he warned.

Approximately six million Cambodians or 45 percent of the population depend on fishing in the Mekong and Tonle Sap basins, the government's Inland Fisheries Research and Development Institute, reports.

The annual "flood" season of daily rain usually starts in July but began a month late, local agricultural surveyors say.

According to the Mekong River Commission, which monitors the river at throughout its member states - Cambodia, Thailand, Laos and Vietnam - this month's levels are among the lowest ever for August. At the port of Phnom Penh, the Mekong plunged to 5.36m on 23 August, against more than 7.5m the same time last year and more than 8.5m in 2000.

Low rice productivity

Not only the fisheries sector is suffering, however.

Rice farmer Meas Chan Thorn in western Pursat Province was only able to plant last week, a month behind schedule, because of the late rains, and predicted yields would be halved.

"It's so difficult for us farmers in Cambodia because we depend entirely on the weather," the 67-year-old said.

According to the UN Food and Agriculture Organization (FAO), Cambodia could experience a 22 percent drop in rice output this year - from 7.6 million MT in 2009 to 5.9 million MT in 2010.

Rice is Cambodia's main crop and its harvesting requires more water than other crops. According to the UN World Food Programme, more than 85 percent of the country's rice production is rain-fed.

Prom Tola, a consultant for Phnom Penh-based Agricultural Development International, who is surveying farmers in Siem Reap Province, said there had been a rise in the number of rural people from Siem Reap leaving for Thailand in search of seasonal labour.

Upstream dams

Som Sitha, who monitors marine life for the NGO Conservation International, said Mekong residents were finding the river levels increasingly unpredictable.

"They complain that it's getting lower every year, especially the last few years, and they say it's preventing them from getting enough fish."

But while observers attribute low river water levels to atypical rainfall patterns this year, others cite upriver dams as the real cause.

Environmentalists blame an increasingly shallow Mekong on China, accusing Cambodia's powerful northern neighbour of hoarding water in its upriver dams.

To date, four dams have been built along the Chinese stretch of the Mekong, with nine more under way or awaiting construction downstream in Laos and Cambodia.

However, according to the Mekong River Commission, the upstream dams have yet to influence downstream water levels.

"There is no doubt that upstream dams, when they do come fully on-line, will have an impact on the water levels, as well as generate other environmental and social concerns," Damian Kean, a spokesman for the Mekong River Commission, said.

"However, at present there is no evidence that Chinese upstream dams are operating at a sufficient intensity to cause these low water levels in Cambodia," he added.

More than 60 million people in the lower Mekong basin rely on the river for food, commerce and transportation, according to the Mekong River Commission. The group says 80 percent of protein consumed by Mekong residents comes from the river.

KlaKhmer
August 26th, 2010, 07:54 PM
Use the west baray :-P in Siem Reap !!
Seriously, I think they are solution for this problem. I believe expert will find an answer :-)

LuvKhm3r
August 27th, 2010, 06:50 AM
This is crazy???? How come they don't have water? and no fish, Cambodia has one of the largest river in the world...:ohno:

Wisarut
August 27th, 2010, 07:54 AM
Dug more and larger baray nationwide to collect more rainwater - clear and simple

KlaKhmer
August 27th, 2010, 10:21 AM
Water becomes very precious. In the future, the price of water will increase. So, maybe it is important to stock water in monsoon season and use it during dry season.
Build a big baray like during Angkor period civilization ? And enhance this technique ?

LuvKhm3r
August 28th, 2010, 06:13 AM
^^ I agree, but most people don't think like that...

KlaKhmer
August 28th, 2010, 07:29 AM
^^ What are they thinking :lol:

LuvKhm3r
August 29th, 2010, 07:17 AM
^^ thinking likes you, "Stock water in monsoon season and use it during dry season." :)

mrfusion
October 6th, 2010, 06:10 AM
Water becomes very precious. In the future, the price of water will increase. So, maybe it is important to stock water in monsoon season and use it during dry season.
Build a big baray like during Angkor period civilization ? And enhance this technique ?

How do you plan to stock trillions of cubic meters of water.

KlaKhmer
October 6th, 2010, 10:11 AM
Trillions of cubic meters ? Where comes from this number ? :) I don't know if we need less or more than that. But I don't think we need to stock all the water but just what people needs.

There are a lot of methods to stock water. But what is the best way to stock it ? Particularly, for a lower price. That is the difficulty.

Method of tank on each house/farm to store the water ? This could help farmer to have water during dry season but need a minimum of investment. Big water tower 30m+ ? but it cost very expensive. Methods of Baray and water network like ancient angkor ancestor ? that worked fine in the past. Or natural method ? Just put trees in nature. Because trees keep and stock water.
Or Science can help ? A scientist find a method to stock water in little solid grain or corn that could be reused when needed.

Well, your review interested me :)

mrfusion
October 6th, 2010, 10:55 AM
Trillions of cubic meters ? Where comes from this number ? :) I don't know if we need less or more than that. But I don't think we need to stock all the water but just what people needs.


For drinking, and a little washing, that would be easy.



Method of tank on each house/farm to store the water ? This could help farmer to have water during dry season but need a minimum of investment.


For farming, which is their greatest concern, from what I heard, there is a lack of water this year, not just water for farming, but some of the farmland will need to be flooded before it becomes fertile. Assuming it is true, it takes a lot of water to flood the land, you probably need 10ML to flood a hectare of farm land, without a good week of heavy rain, this can't happen. The late rain is what cause the farmer to loose a month or more of time, if the land is flood too late, it does not have time to grow crops before the dry season arrive.

How much farrm land are unfertile due to lack of rain this year? trillion liter is underestimate.

Or natural method ? Just put trees in nature. Because trees keep and stock water.
Tree retains soil from run off, it consumes water too.

BetterForAll
October 6th, 2010, 02:18 PM
Countries along the Mekong river have built dams and will build some more. Every county keeps the water. Is this can be the cause??

KlaKhmer
October 6th, 2010, 05:42 PM
Countries along the Mekong river have built dams and will build some more. Every county keeps the water. Is this can be the cause??

I heard dams have impact on ecosystem life (fish...) but the lack of water comes from the climatic changment. Like mrfusion said, the moosson season womes late this year.

KlaKhmer
October 6th, 2010, 06:01 PM
For drinking, and a little washing, that would be easy.




For farming, which is their greatest concern, from what I heard, there is a lack of water this year, not just water for farming, but some of the farmland will need to be flooded before it becomes fertile. Assuming it is true, it takes a lot of water to flood the land, you probably need 10ML to flood a hectare of farm land, without a good week of heavy rain, this can't happen. The late rain is what cause the farmer to loose a month or more of time, if the land is flood too late, it does not have time to grow crops before the dry season arrive.

How much farrm land are unfertile due to lack of rain this year? trillion liter is underestimate.

Tree retains soil from run off, it consumes water too.

Without trees, when the soil is dry, water fall down very fast in the soil.
Trees and its root retains water because of a lot of reason. When it rains, the water go down in the soil more slowly because of root and leaf. And shadow reduce the evaporation. So this is important to plant trees to keep water and the nature.

But to have water for drink... for all day. Cambodia need to dig in the soil very deeply. This need technology for water (dig and treat water) . It already exist in Cambodia but should be expand everywhere.

mrfusion
October 11th, 2010, 04:58 AM
Without trees, when the soil is dry, water fall down very fast in the soil.
Trees and its root retains water because of a lot of reason. When it rains, the water go down in the soil more slowly because of root and leaf. And shadow reduce the evaporation. So this is important to plant trees to keep water and the nature.

But to have water for drink... for all day. Cambodia need to dig in the soil very deeply. This need technology for water (dig and treat water) . It already exist in Cambodia but should be expand everywhere.

I am no expert, so not ready to challenged your reasoning, but what good is farming land full of trees.

KlaKhmer
October 11th, 2010, 07:51 PM
I'm not expert :lol: I'm a big noob and a crazy guy with big imagination. :D

mrfusion
October 13th, 2010, 11:54 AM
The water did come, the heavy rain on Monday must have flood lots of places, a good section of the road outside the Phnom Penh Airport is completely flood.

The section of railway that cross the Highway 4 is also underwater. I was on the road yesterday, there must be hundreds of trucks waiting to get back to the coast.

I wouldn't even dare to get into the city center, as the whole place must be gridlocked.

KlaKhmer
October 13th, 2010, 07:10 PM
^^ Flood is a reccurent problem in Cambodia. I guess we need to enhance sewer system in the cities and make a lot of dam on the river (not for electricity) but to regulate/stock water. And when there are flood, open the dam to let water go to the sea. During the dry season close the dam, so boat can navigate on the river. I guess Cambodia need to build so much things.

LuvKhm3r
October 14th, 2010, 02:32 AM
I agree....:D

mrfusion
October 14th, 2010, 06:00 AM
^^ Flood is a reccurent problem in Cambodia. I guess we need to enhance sewer system in the cities and make a lot of dam on the river (not for electricity) but to regulate/stock water. And when there are flood, open the dam to let water go to the sea. During the dry season close the dam, so boat can navigate on the river. I guess Cambodia need to build so much things.

I think they are working on the sewer bit by bit, they build huge trenches in areas to displace water, but with huge rain like Monday, you can't even see the trenches, is all overflowed.

I am not sure if is possible to build lots of dams, I don't know the geography of the mekong or other river system, do we have the right geography (mountains) to build dams. you will also need to displace lots of poor people (maybe millions) that live by the rivers.

The farmlands actually do need the seasonal flood, is just unfortunate the ancestor build the capital in a major flood zone.

KlaKhmer
October 14th, 2010, 08:35 AM
Build sewer is very long task. Yes, Cambodia has heavy rain. So, sewer must be better than everywhere. Imagine, in some cities, sewer is long as more than 6000 km for just a city. To maintain cost very expensive because the sewer is very old (more than 100 year).

This is a little damn (not for electricity) but just to "regulate" the water. Open All / Open Half / Close the damn. Permit to avoid some flood or keep more water when the season is dry.
http://img.over-blog.com/540x358/0/58/41/09/lemont-saint-michelretrouvelamer.jpg

mrfusion
October 16th, 2010, 11:12 AM
Build sewer is very long task. Yes, Cambodia has heavy rain. So, sewer must be better than everywhere. Imagine, in some cities, sewer is long as more than 6000 km for just a city. To maintain cost very expensive because the sewer is very old (more than 100 year).

This is a little damn (not for electricity) but just to "regulate" the water. Open All / Open Half / Close the damn. Permit to avoid some flood or keep more water when the season is dry.
http://img.over-blog.com/540x358/0/58/41/09/lemont-saint-michelretrouvelamer.jpg

Sewer need to be big, it also can not be block, a problem is lots people just leave the rubbish on the floor, or next to the sewer, or dogs break the bag and the rubbish is everywhere, these get washes into the system and block everything.

Storm water sewer need a big reservoir at the end, and huge industrial pump get rip of the water, but it also need somewhere to pump the water out.

A uncle told me, one of the main issue contribute to serious flood is the water got no where to do, government sold the lakes to the developers, and these lakes which serve as huge reservoir are filled. The water used to flood these lakes first, and during the dry season, the water slowly dries out. Without these natural huge reservoir, these man make stormwater sewer can only do so little.

KlaKhmer
October 16th, 2010, 04:07 PM
Normally, sewer used to be maintain and clean all days. I hope PP will have a big one ;)

It is certain. The lake help against flooding. But I heard this month, flooding is everywhere.

Cambodia = comes from the term Cambu = Kingdom borns from the water if I remember.
So, water has always been there in Cambodia. A country of water.