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Mekong and Rice

The Mekong River summit has recently convened leaders from all 6 riparian nations. This is a big step forward in terms of regional cooperation & dialogue, and should be viewed as an important event.

I have been curious how the demand for water breaks down within the basin, both by nation and activity. Specifically, relative to the whole flow of the river, which activities use the most water?

According to the Mekong River Commission (from a document they published in 2004), 80% of all water abstractions are agricultural in nature in the Lower Mekong Basin (comprised of Lao PDR, Vietnam, Thailand, and Cambodia). This suggests the potential for enormous water savings through the development of rice varieties that are tolerant to pests and drought.

The International Rice Research Institute have tremendous resources on rice research, and have an excellent section on Genetically Modified rice varieties.

The discussion of water security in the Mekong Basin, is implicitly tied to food security. It is in the best interests of the MRC nations to examine the largest water demand activity in the LMB, and focus their actions accordingly.

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Drought in the Mekong River Basin

The last week has seen an eruption of chatter and concern over the low flows in the Mekong River, and the impacts on downstream Riparian nations, specifically Thailand, Laos, Cambodia, and Vietnam.

First and foremost, the current drought conditions are not isolated to the Mekong Basin. The Southwestern Chinese provinces of Guizhou and Yunnan have experienced unprecedented drought (as I have been following on this blog). The drought has led to widespread crop-failure, and subsequent famine risk.   I find the amount of blame being placed on China surprising and perhaps inappropriate.  Admittedly, China’s dams are likely holding some of the water back that would normally flow down the Mekong as some of the articles point out below.  The Chinese officials in these (and other) articles continue to reference their use of water in terms of the “average flow” of the Mekong, but given that current conditions are not “average” the abstraction from the river should be compared to actual, current Mekong flow.

It is very promising to hear and read that the MRC is successfully convening a summit of all six riparians, something which has not happened for over a decade.  Certainly, the downstream riparians will need China to be a part of a coordinated Integrated Water Resources Management (IWRM) plan.  In a water scarce future, with increasing demands for agriculture, fisheries, electricity and transport, the downstream riparians comprising the current MRC members  .  This basin may serve as interesting basin in which downstream riparians will seek other key points of leverage with which to influence China’s hydrologic policy, possibly involving other regional or global actors to help provide pressure for China to cooperate.



A particular glitch in the current web-coverage of the Mekong situation is the number of Chinese dams on the Lancang, or upper Mekong River. Above, you can see a graphic originally provided by International Rivers. I have edited the colors used to indicate the dams (changing the three colors used to denote different categories of construction status from dark blue, black and white, to yellow, red and green). I also edited the inset map to clarify the location of this part of the Mekong.

Hopefully, this map will help to provide some clarity as Chinese hydroelectric projects move forward.

Here is a collection of articles from the region and beyond examining the current situation in the Mekong River basin:
“… the filling of the Xiaowan dam’s reservoir happens to coincide with the onset of the current drought and the subsequent drop in downstream flows.”  For whom the mighty Mekong flows, Bangkok Post, March 31

“…poverty in the GMS (Greater Mekong Subregion) remains high, with average GDP per capita of less than $2 per day.” Mekong countries working hard by slowly to lift region, Bangkok Post, March 31

“…the growing crisis has spurred a diplomatic discussion and the first summit meeting of the six riparians in the 15-year history of the Mekong Commission.” The coming crisis over the Mekong — unconstrained development, natural droughts, and climate change, SF Gate, April 3

“Song said the runoff volume of Lancang River accounts for only 13.5 percent of that of the Mekong River.  The runoff of Mekong River mainly comes from the middle-and-lower Mekong basin, amounting to 86.5 percent.” China to boost co-op with downstream Mekong countries, China Daily, April 4

” Chinese officials dismissed concerns that their waterwords had affected downstream countries… “At present, we only use a tiny part of the average flow of the Lancang…” China Dam Plans raise Mekong fears, Financial Times, March 31
NOTE:  I would like to point out that the Financial Times article seems somewhat misleading, because it gives the impression that the drought hit areas of SW China, including Yunnan and Guizhou, are hydrologically linked to the Mekong River basin.  Although these regions are experiencing the same climatological drought conditions, they are not hydrologically linked since they are within separate watersheds.