河北省军粮城河水之含盐量

河北省军粮城区之盐碱土之开垦及利用,全赖引用河中淡水洗碱及灌溉。作者曾搜集日本人留下有关军粮城河水含盐量之资料(民国卅一年至卅四年河水分析结果),加以中央农业实验所北平农事试验场民国卅十五年及三十六年分析军粮城河水含盐量之结果,研究河水含盐量之变化情形。兹将已得结果简略报告如后。本报告中分析之河水,全取自军粮城(?)家河。袁家河南接天津海河北经灭河通金钟河。(见图)。袁家河河水全来自海河及金钟河,故其河水水位及含盐量受海河及金钟河河水位及含盐量之影响甚大。

Nacl Content of River Water at Chungliangchen.

Nacl content of river water at Chungliangchen varies with the flow and ebb of tide,being generally higher at low tide.This is attributed to the effect of drainage water which flows into the river at low lide.The seasonal fluctuation of Nacl content of river is studied.Nacl content at high tide is highest between the second half of June and the first half of July.During this period,the Nacl content at high tide may exceed that at low tide in some years.The significance of this as regards irrigation and effec...