运用构造控水分析、水化学同位素等方法，对宁南“南北古脊梁”岩溶裂隙水系统进行了深入的分析与讨论。
Karstfracture groundwater in the south-east of Ningxia has been synthetically analyzed by applying the theories of tectoniccontrolled groundwater, groundwater geochemistry and isotopic techniques.
把古洪水加入到洪水系列后进行频率计算，可以看出频率曲线基本合理，说明对1482年洪水重现期的判断是合理的。
It can be seen that the frequency curve calculation is basically reasonable and show the estimation of "1482 flood" return period is rational after putting palaeofloods into flood series.
这里古地震遗迹丰富，断错山脊、水系明显。
There are rich palaeoseismic vestiges) offsetted ridges and river systems are apparent.
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