在我国新疆吐鲁番地区 ,有一种特殊的水利工程 ,即闻名国内外的“坎儿井”。“坎儿井”为人工挖掘 ,由直井、地下渠道、地面通道和蓄水池组成 ,引天山雪水深藏地下。这些雪水通过地下渠道流到各村庄 ,用于人畜饮水和灌溉果园农田 ,既避免了阳光暴晒导致的水分蒸发损失 ,又可减 Turpan region in our country in Xinjiang, there is a special water conservancy project, that is known at home and abroad, “Karez.” “Karez” is a man-made excavation, which consists of vertical wells, underground channels, surface channels and reservoirs. The snow water flows through underground channels to villages for drinking water for people and livestock and for irrigating orchards and farmland, which avoids the loss of water evaporation caused by sun exposure and reduces