黄河水主要化学组分与δ^(13)C的沿程变化特征

Main Chemical Constituent of the Yellow River Water and Characteristics of δ^(13)C Streamwise Variation

在系统采集从黄河源头至入海口的17条河谷断面上的黄河水、地下水和地表水水样,并测定其主要化学组分含量和1δ3C同位素组成的基础上,对黄河水主要化学组分含量及同位素组成沿程变化特征进行了综合分析。黄河水具有从源头到入海口水化学变化大,δ13C比值波状下降的总体变化特点。研究认为,地表径流和岩溶地下水等水体对河水的补给以及灌溉回归水是导致河水水化学组成和同位素变化的最主要因素。

The paper comprehensively analyzes the main chemical constituent content of the Yellow River water and characteristic of isotope streamwise variation based on samples of the Yellow River,groundwater and surface water systematically collected from 17 valley sections from the river head to river mouth and the observation of its main chemical constituent content and δ^(13)C isotope component.The Yellow River water has the characteristics of overall variation of great hydrochemical variation and undulating fall of δ^(13)C proportionality from the river head to river mouth.It considers through study that the replenishment of surface runoff and karsk groundwater to the river and irrigation return flow are the most important factors for conducing hydrochemical composition and isotope variation of the river.