江苏沿海悬浮指标特性及含沙量垂线分布公式的选取  

Characteristics of suspension index and comparisons of sediment concentration vertical distribution formulas in Jiangsu coastal area

作　　者：陈橙[1] 王义刚[1] 黄惠明[1] 袁春光[1] 

机构地区：[1]河海大学海岸灾害及防护教育部重点实验室,江苏南京210098

出　　处：《泥沙研究》2014年第3期42-48,共7页Journal of Sediment Research

基　　金：国家科技支撑计划项目(2012BAB03B01);江苏省普通高校研究生科研创新计划项目(CXZZ13_0258);中国近海海洋综合调查与评价专项(江苏省908专项);江苏省自然科学基金青年基金项目(BK2012411)

摘　　要：基于大范围江苏沿海悬沙含沙量实测资料,拟合各经典含沙量垂向分布公式,分析悬浮指标的影响因素,结果表明,江苏沿海夏季的悬浮指标远大于冬季,且大小潮以及涨落潮对悬浮指标的影响具有地区差异性。此外,悬浮指标的拟合与公式选取有关,Laursen公式拟合计算出的悬浮指标最大,其次是Tanaka-Sugimoto公式。对各公式的含沙量计算结果进行分析可知,Laursen公式计算出的含沙量最大,其次为Tanaka-Sugimoto公式,而Rouse公式计算结果最小。最后分析了含沙量垂向分布公式在时空差异上的最优选取,结果表明江苏沿海北部以Lane-Kalinske公式为主,而南部则以Rouse公式居多;夏季较多采用Rouse公式和Lane-Kalinske公式,但冬季则以Lane-Kalinske公式和Laursen公式为主,该结论可为今后江苏沿海局部地区进一步的科学研究及工程应用提供一定帮助。Based on a wide range of measured data of suspended sediment concentration in Jiangsu coastal area,the sediment vertical distribution formulas are tested.Analysis of the influencing factors of suspension indexes show that suspension indexes are much larger in summer than in winter.Variation of spring/neap tide or max ebb/flood has regional influence on suspension indexes.In addition,the fitting accuracy of suspended index is directly related to difference formulas.Comparison of the suspended sediment concentration calculated by each formula shows that the concentration calculated by Laursen formula is the largest,followed by TanakaSugimoto formula; while the concentration calculated by Rouse formula is the smallest.Finally,the optimal selections of sediment concentration vertical distribution formula in the condition of temporal and spatial variation are proposed.The result shows that Lane-Kalinske formula is suitable in northern part,while Rouse formula is suitable in southern part; the formulas in summer are mainly Rouse formula and Lane-Kalinske formula,while in winter are mainly Lane-Kalinske formula and Laursen formula.

关 键 词：江苏沿海 悬沙 含沙量 悬浮指标 时空差异 

分 类 号：TV148[水利工程—水力学及河流动力学]