Because of lower water-tables and depleted aquifers, many rivers can no longer replenish themselves in the dry season.
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The plan would displace about 30, 000 people and affect tens of thousands more who graze cattle there in the dry season.
In the dry season, though, after the crop has been harvested, the trees shoot upwards and reach three metres in height in eight months.
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In the dry season months of June to October the undergrowth is less dense and the chimps frequently come down near the main lodge area to feed.
That requires a consistent flow through the turbines, which in turn requires rainwater to be held in a reservoir for use in the dry season.
These few survivors, she explains, follow the fish in the dry season to deep pools in the bed of the river near Kratie, in Cambodia.
To break free of this unhappy equilibrium, farmers must set aside a portion of their land to grow cash crops in the dry season, when they fetch a high price.
The runoff of Zongo Glacier Bolivia, 16S shows an appreciable seasonal variability, with low discharges in the dry season May to August and high values in the humid season October to March .
The effect will be to increase the dry-season flow in the Mekong mainstream from China to the Mekong delta.
It's the very end of the dry season now in Southern Africa, and the land is a dull, lifeless beige.
The company says that these reservoirs will provide year-round water supplies in areas that currently suffer during the dry season.
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The recent decrease in rainfall has occurred during the country's dry season, and has thus affected only the second rice crop, which accounts for a fifth of the total in a normal year.
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The third offensive is expected in May, to coincide with the beginning of the dry season.
Silted-up rivers must be expensively dredged before the dry season ends in May, or they will flood again with the first rains.
Only a couple of inches of rain have fallen in Southern California since the start of the year, making the region as dry as it normally would be in the fall, when fire season is typically at its peak.
Less than one-sixth of the total Mekong catchment is in China, but that upstream flow is crucial to neighbours during the dry season.
For this reason, it is considered futile to attempt cloud seeding during a dry season, when moisture in the atmosphere is scarcer.
But there was method to my madness because by the next dry season, the fate of the Cardamoms, the last great wilderness left in Indochina, may already be decided, before almost anyone from the outside world gets a look at it.
In Southeast Asia, where they originate, they live in irrigation ditches and rice paddies, thriving there until the dry season, when their pools shrink and they squirm along to the next pocket of water.
An agreement in 1996 to share water from the Ganges river during the dry season has helped to improve relations with India, although Mr Vajpayee and Sheikh Hasina have so far been unable to agree to share water from another 50 rivers.
"Glaciers provide about 15% of the La Paz water supply throughout the year, increasing to about 27% during the dry season, " said co-author Alvaro Soruco from the Institute of Geological and Environmental Investigations in Bolivia.
His basic guidelines: Wash or dry clean all your clothes before you store them away in a separate closet from the in-season clothes you're wearing now.
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