Spatial and temporal correlation between beach and wave processes： implications for bar-berm sediment transition  

作　　者：V. JOEVIVEK N. CHANDRASEKAR S. SARAVANAN H. ANANDAKUMAR K. THANUSHKODI N. SUGUNA J. JAYA 

机构地区：[1]Centre for GeoTechnology, Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli 627012, Tamil Nadu, India [2]Akshaya college of Engineering and Technology, Kinathukadavu, Coimbatore 642109, Tamil Nadu, India

出　　处：《Frontiers of Earth Science》2018年第2期349-360,共12页地球科学前沿（英文版）

摘　　要：Investigation of a beach and its wave condi-tions is highly requisite for understanding the physicalprocesses in a coast. This study composes spatial andtemporal correlation between beach and nearshore pro-cesses along the extensive sandy beach of Nagapattinamcoast, southeast peninsular India. The data collectionincludes beach profile, wave data, and intertidal sedimentsamples for 2 years from January 2011 to January 2013.The field data revealed significant variability in beach andwave morphology during the northeast （NE） and southwest（SW） monsoon. However, the beach has been stabilized bythe reworking of sediment distribution during the calmperiod. The changes in grain sorting and longshoresediment transport serve as a clear evidence of thesediment migration that persevered between foreshoreand nearshore regions. The Empirical Orthogonal Function（EOF） analysis and Canonical Correlation Analysis （CCA）were utilized to investigate the spatial and temporallinkages between beach and nearshore criterions. Theoutcome of the multivariate analysis unveiled that theseasonal variations in the wave climate tends to influencethe bar - berm sediment transition that is discerned in thecoast.Investigation of a beach and its wave condi-tions is highly requisite for understanding the physicalprocesses in a coast. This study composes spatial andtemporal correlation between beach and nearshore pro-cesses along the extensive sandy beach of Nagapattinamcoast, southeast peninsular India. The data collectionincludes beach profile, wave data, and intertidal sedimentsamples for 2 years from January 2011 to January 2013.The field data revealed significant variability in beach andwave morphology during the northeast （NE） and southwest（SW） monsoon. However, the beach has been stabilized bythe reworking of sediment distribution during the calmperiod. The changes in grain sorting and longshoresediment transport serve as a clear evidence of thesediment migration that persevered between foreshoreand nearshore regions. The Empirical Orthogonal Function（EOF） analysis and Canonical Correlation Analysis （CCA）were utilized to investigate the spatial and temporallinkages between beach and nearshore criterions. Theoutcome of the multivariate analysis unveiled that theseasonal variations in the wave climate tends to influencethe bar - berm sediment transition that is discerned in thecoast.

关 键 词：BEACH NEARSHORE SANDBAR grain size empiri-cal orthogonal function canonical correlation analysis 

分 类 号：P[天文地球]