针对宁夏贺兰山沟道流域面积小、暴雨洪水突发性强、洪水预见期短的特点,在了解国内外洪水预报方法及小流域洪水预报难点的基础上,......

The Helanshan tectonic belt is located to the west of the Ordos Basin,and separates the Alxa(or Yinshan)Massif to the we......