银川平原和河西走廊都是当地重要的农业区，它们的灌溉水源有什么不同？

Question

银川平原和河西走廊都是当地重要的农业区，它们的灌溉水源有什么不同？
                                                                                                                                                                
                                                                                                                                                                

Answer 1

提示：银川平原的灌溉水源是黄河水；河西走廊的灌溉水源是祁连山的冰雪融水。