本文選題：白浪河 + 河水�。� 參考：《水文地質(zhì)工程地質(zhì)》2016年05期

【摘要】：在海水入侵的研究中,通常將海水作為一個(gè)重要的混合端元。而一般沿海帶的海水,尤其是河口海水相對于標(biāo)準(zhǔn)海水都會(huì)受到入海河流以及沿海人為活動(dòng)的強(qiáng)烈影響,在空間和時(shí)間上的分布不斷在變化。因此在研究海水入侵之前,研究河口海水、標(biāo)準(zhǔn)海水與河水成分之間的混合關(guān)系至關(guān)重要。本研究主要是對比海水和地表水的穩(wěn)定同位素和水文地球化學(xué)成分。在萊州灣入海河流白浪河的下游沿岸采集5件河水樣品,河口采集7件海水樣品,對樣品進(jìn)行了水化學(xué)和穩(wěn)定同位素測試,研究淡水和海水的混合關(guān)系。采用惰性示蹤劑(δD、δ~(18)O、Cl~-、Br~-)和反應(yīng)示蹤劑(Na~+、Mg~(2+)、SO~(2-)_4、HCO~-_3、Ca~(2+)、NO~-_3)展開分析。在δD-δ~(18)O關(guān)系圖上,所有的河水樣品都位于全球大氣水線之下,反映了上游水庫水的蒸發(fā),海水樣品則位于標(biāo)準(zhǔn)海水與河水樣品的混合線上。河水樣品δ~(18)O—Cl~-關(guān)系表明不同程度的溶解了蒸發(fā)鹽;河水樣品的Ca~(2+)、HCO~-_3、SO~(2-)_4與Cl~-的比值反映了CO_2氣體、碳酸鹽以及硫酸鹽溶解。海水樣品的Br~-/Cl~-比值與海水比值基本相同,與其它主要離子與Cl~-的關(guān)系都表明海水樣品源于標(biāo)準(zhǔn)海水與河水的混合。因此當(dāng)河水和海水混合時(shí),兩種水體的溶劑發(fā)生機(jī)械混合,溶質(zhì)中海水占主導(dǎo)的化學(xué)成分與Cl~-比值都接近海水比值,包括Na~+、Mg~(2+)、SO~(2-)_4、Br~-和Cl~-的比值,而大陸生成的成分在淡水中與Cl~-的比值都會(huì)大于海水比值,主要有HCO~-_3、Ca~(2+)、NO~-_3和Cl~-的比值。這種混合機(jī)理也適用于地下水。
[Abstract]:In the study of seawater intrusion, seawater is usually regarded as an important mixed end element. In general, the sea water in coastal zone, especially the estuarine seawater, is strongly influenced by rivers entering the sea and coastal human activities, and its spatial and temporal distribution is constantly changing. So it is very important to study the mixing relationship between the standard seawater and the river water composition before the study of seawater intrusion. In this study, the stable isotopes and hydrogeochemical compositions of sea water and surface water were compared. Five samples were collected from the lower reaches of the Bailang River in Laizhou Bay, and seven samples from the estuary were collected. The samples were tested for hydrochemistry and stable isotopes, and the mixing relationship between fresh water and seawater was studied. The analysis was carried out by means of inert tracer (未 D, 未 D) and reaction tracer (Na). In the 未 D- 未 ~ (18) O relation diagram, all the river water samples are located below the global atmospheric water line, reflecting the evaporation of upstream reservoir water, and the seawater samples are located on the mixed line of standard seawater and river water samples. The 未 ~ (18) O -Cl ~ (-) -relationship of river water samples indicates that the evaporative salts are dissolved to varying degrees, and the ratio of Ca~(2 / HCO-3 / C ~ (2 +) to Cl ~ (-) reflects the dissolution of CO_2 gas, carbonate and sulphate. The Br-/ / Cln- ratio of seawater samples is basically the same as that of seawater samples, and the relationship with other major ions and Cl- shows that the seawater samples are derived from the mixing of standard seawater and river water. Therefore, when the water is mixed with seawater, the solvents of the two kinds of water are mechanically mixed, and the ratio of the dominant chemical components in the solute to the Cl ~ (-) is close to that of the seawater, including the ratio of Na ~ (2 +) MgO ~ (2 +) and so _ (2) to the ratio of ~ (4) Br-O ~ (-) and Cl ~ (-). However, the ratios of continental components to CL- in fresh water are higher than those of seawater, and there are mainly the ratios of HCO-3Ca-Cam ~ (2 +) and Cl ~ (-) ~ (3) in fresh water. This mixing mechanism also applies to groundwater.
【作者單位】： 中國地質(zhì)大學(xué)(北京);北京市水文地質(zhì)工程地質(zhì)大隊(duì);中國地質(zhì)環(huán)境監(jiān)測院;山東省地質(zhì)環(huán)境監(jiān)測總站;
【基金】：國家公益性行業(yè)科研專項(xiàng)“典型海岸帶地質(zhì)環(huán)境監(jiān)測關(guān)鍵技術(shù)與評價(jià)方法”(201011019)
【分類號】：P342;P734
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本文編號：1841702