疫霉菌攻击树木的根，更在连年干旱的情况下切断了它们供水。

The fungus attacks the roots of the trees, choking off a water supply that has been made scarce by successive years of drought.

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三条人工水渠将珍贵的水源从南方长江转移，而那里已经连年干旱；

Three artificial channels from the Yangtze would transport precious water from the south, which itself is increasingly afflicted by droughts;

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杜先生说自90年代起，由于连年干旱，水流量持续下降，而规划并未作出相应的修改。

Since then, the water flow has dropped, partly because of prolonged droughts, but planners have made no adjustments, Mr. Du said.

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