近几十年来西北江三角洲网河区顶点的河相关系  

Variations in At-a-Station Hydraulic Geometry of the Pearl River Delta in Recent Decades

作　　者：贾良文 杨清书[2] 钱海强 罗宪林[2] 罗章仁[2] 杨干然[2] 

机构地区：[1]广东省航道局,广东广州510115 [2]中山大学河口海岸研究所,广东广州510275 [3]广东省水文局三水水文站,广东三水528133

出　　处：《地理科学》2002年第1期57-62,共6页Scientia Geographica Sinica

基　　金：交通部"九五"重点科技攻关项目"珠江三角洲航道网水沙及数学模型研究"(编号 :95 -0 5 -0 1-5 3)之II级课题"珠江三角洲主要水道河床演变研究"的部份内容

摘　　要：据西北江三角洲网河区顶点马口、三水两水文站 195 9～ 1988年的实测大断面、流量、流速和水位资料 ,采用Leopold的水力几何形态关系建立断面河相关系 ,探讨两水文观测断面的河相关系特征、年际变化及河相关系的差异。河相关系表明 ,西北江三角洲的断面水力几何形态指数 β1 值相对较小 ,而 β3 值相对较大 ,代表了珠江特有的丰水少沙河流的河相关系。Hydrological data of Sanshui and Makou hydrometric stations were collected in the Pearl River Delta. Hydraulic geometry represents the regulation of flow and channel. Hydraulic geometry was used to analyse the at a station hydraulic geometry. It was shown that the change in discharge ( Q ) with river width ( B ), mean depth( h ), mean velocity( U ) at the Sanshui cross section differ from those at Makou cross section. The characteristics of the at a station hydraulic geometry in the Pearl River Delta indicated that the exponent value β 1 is much less and β 3 is much greater than that of the Yellow River and the Yangtze River.

关 键 词：河相关系 珠江三角洲 流量 断面 流速 水位 年际变化 

分 类 号：P343.1[天文地球—水文科学] P332.3[天文地球—地球物理学]