钱塘江河口环境要素空间分布特征的初步研究  

Preliminary Study on Spatial Distribution of Environmental Elements in Qiantang River Estuary

作　　者：刘冬雪 刘丽敏 曾燕燕 

机构地区：[1]浙江省河海测绘院,浙江杭州310008

出　　处：《浙江水利科技》2015年第1期1-4,共4页Zhejiang Hydrotechnics

基　　金：水利部公益性行业科研专项(201101056);浙江省重点科技创新团队计划(2010R50035)

摘　　要：为了解钱塘江河口环境要素的空间分布特征,对钱塘江河口平均水体的透明度、DO、p H、盐度及表层沉积物粒度特征进行了监测和分析。研究范围覆盖整个钱塘江河口,共布设25条断面54个测点及采样点。研究表明：水体透明度在0.1~1.4 m,中、下游水体透明度低于上游;DO低值区多集中在富阳至浦阳江一段,其中富阳断面DO值最低（平均值2.0 mg/L）;盐度变化范围为0.050‰~28.240‰,总体上呈现从上游、中游至下游逐渐增大的趋势,其中,盐度值从七堡到顺坝断面以及从奉贤到镇海断面有2个明显突越;钱塘江河口上游和下游表层沉积物主要成分为粉砂,中间段主要成分为粉砂和砂,表层沉积物中粒度小于0.063 mm的组分在钱塘江河口中所占比例依次为：下游〉上游〉中游;钱塘江河口平均水体中透明度、DO和p H这3项环境要素之间存在显著相关性。In order to understand spatial distribution of environmental elements in the Qiantang river estuary, this paper makes a monitoring and analysis of transparency, DO, PH, salinity and surface sediment granularity characteristic of average water in the Qiantang river esmai？,. The whole Qiantang river estuary was studied in this paper, which including 25 section, 54 measuring points and samphng points. Studies have shown that the water transparency of middle and lower reaches is lower than the upstream, which is in 0.1 - 1.4 m. Lower DO areas are concentrated in Fuyang to Puyangjiang, among them, the DO of Fuyang section is the lowest （average 2.0 mg/L）. Salinity ranges from 0.050 %~ to 28.240%~, it generally shows a gradually increasing trend from upstream, midstream to downstream. While two obvious bursting point of salinity occur in the following two sections which are from Qibao to Shunba and from Fengxian to Zhenhai. The main component of the surface sediments is silt in the Qiantang river ups~;am and downstream, and silt and sand are the main component in the middle section. The largest proportion of which the granularity less than 0.063 mm in the surface sediments of the Qiantang river estuary is in an order of downstream 〉 upstream 〉 midstream. In addition, there is a significant correlation among transparency, DO and pH of the average water in the Qiantang river estuary.

关 键 词：钱塘江河口 环境要素 空间分布 特征 

分 类 号：TV213.4[水利工程—水文学及水资源]