杭州湾溶解态的Ca2+,Mg2+,SO42-

为研究杭州湾河口海水地区性水化学特征，于１９９４年５月和１９９３年８月在杭州湾１４个大面站和两个连续站采集表层海水水样，对Ｃａ＾２＋、Ｍｇ＾２＋、ＳＯ４＾２－及Ｓ，Ｃｌ等化学要素进行了测定。研究结果表明，与黄河口长江口一样，杭州湾中溶解态Ｃａ＾２＋、Ｍｇ＾２＋、ＳＯ４＾２－主要受陆源径流与外海水物理混合稀释的影响，与Ｃｌ具有良好的线性关系。由于受北岸工业排废水的影响，Ｃａ＾２＋与Ｃｌ线性相关比Ｍｇ

DISSOLVED Ca2+, Mg2+, SO42- IN THE HANGZHOU BAY

Hangzhou Bay is a typical trumpet estuary which lies in the middle of our country. It is a region where outersea water mixes with terrestrial freshwater. Its Physicochemical property and water chemistry have special characteristics during the mixing process of freshwater and seawater. Seawater samples at 14 area stations and 2 adjacent stations in Hangzhou Bay were collected in May 1994 and Aug. 1993. Chemical key elements of dissolved Ca2+, Mg2+, , Cl and s were measared. The results indicated that dissolved Ca2+, Mg2+, at the Hagzhou Bay estuary had linear relationships with Cl as Huanghe and Changjiang River. Their concentrations were influenced by mixing and dilution with river water, industrial discharge and ocean water. Fit equatiopns are: b8station was deleted) bl station was deleted)The Ca2+ / Cl ratio at area stations was , Mg2+ /Cl ratio was / Cl was /Cl ratio was 28.8% higher than that in the ocean. While Mg2+ / Cl and ratios were sindlar to those in the ocean. The high Ca2+ / Cl ratios at individual stations were influenced by industrial discharge at the north of the bay. Isopleths of Ca2+, Mg2+, / cl changed progressively from northeast to southwest Water chemistry of two continuity stations were different because of complicated global chemical characteristic on the north of Hangzhou Bay. Fluxes of dissoved Ca2+, Mg2+, from Qiantang River to ocean were t/ a which were less than those of the Yellow River and Changjiang River.