Costly reservoirs should be seen as a last resort. In Taiwan, with its irregular rainfall, says Chang Shih-chiao, "reservoirs are very important," but they are an emergency backup.
成本高昂的水庫，應該是被視為不得已的手段，對雨量不均的台灣，「水庫很重要」，張石角說，但它是救急用的。