School of Karst Science, Guizhou Normal University, Guiyang 550001, China.
State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China.
Int J Environ Res Public Health. 2021 Dec 14;18(24):13169. doi: 10.3390/ijerph182413169.
In karst areas, the characteristics of water chemistry and carbon and nitrogen are of great significance to basic research. The contents of Ca, Mg, K, Na, HCO, SO, NO, Cl, dissolved organic carbon (DOC), and total nitrogen (TN) in water samples from 18 rivers and 14 springs in the Huangzhouhe River Basin were determined. The results showed that the water chemistry type in the Huangzhouhe River Basin is HCO-Ca-Mg. The chemical composition is mainly affected by dolomite weathering and also by ion exchange and other human activities. The river and spring DIC remain at the same level in the upper and middle reaches and decrease in the lower reaches. The NO-N and TN of river water and TN of spring water increase in the middle reaches, while NO-N of spring water decreases in the lower reaches. The DOC in the basin increases with the increase of SO and Cl, mainly due to the human influence of agricultural and domestic sewage. In the basin, the NO-N and TN in spring water are larger, and the DOC in river water is larger, mainly because there are more phytoplankton and human activities in the river water. The carbon and nitrogen in the Huangzhouhe River Basin are mainly HCO and NO ions. The evaluation of pH, Cl, NO-N, SO, and TDS shows that the water quality is good and the ecological environment is good.
在喀斯特地区，水化学和碳氮特征对基础研究具有重要意义。本研究对黄桥河流域的 18 条河流和 14 个泉水中的 Ca、Mg、K、Na、HCO、SO、NO、Cl、溶解性有机碳（DOC）和总氮（TN）含量进行了测定。结果表明，黄桥河流域的水化学类型为 HCO-Ca-Mg。化学组成主要受白云岩风化的影响，也受离子交换和其他人为活动的影响。河流水和泉水中 DIC 在中上游保持在同一水平，在下游减少。河水中的 NO-N 和 TN 以及泉水中的 TN 在中游增加，而泉水中的 NO-N 在下游减少。流域内的 DOC 随着 SO 和 Cl 的增加而增加，主要是由于农业和生活污水的人为影响。在流域内，泉水中的 NO-N 和 TN 较大，河水中的 DOC 较大，主要是因为河水中有更多的浮游植物和人类活动。黄桥河流域的碳氮主要以 HCO 和 NO 离子的形式存在。对 pH、Cl、NO-N、SO 和 TDS 的评价表明，水质良好，生态环境良好。
