Delta Development in the Nakdong River Estuary: a Literature Survey

J. Ocean Eng. Technol. 2007;21(2):22-34.

Yoon, Han-Sam;Yoo, Chang-Ill;Kang, Yoon-Koo;Ryu, Cheong-Ro;

Research Center for Ocean Industrial Development, Pukyong National University;Dept. of ocean Engineering, Pukyong National University;Port Management Team, Engineering Construction Group, Samsung Corporation;Dept. of ocean Engineering, Pukyong National Un

낙동강 하구역 삼각주 발달에 관한 문헌 고찰 연구

윤한삼;유창일;강윤구;류청로;

부경대학교 해양산업개발연구소;부경대학교 해양공학과;(주)삼성물산 건설부문 항만팀;부경대학교 해양공학과;

Keywords: Nakdong river, Estuary, Sandy barrier, Delta, Estuarine deposit, Historical development, Development mechanism

핵심용어: 낙동강, 하구역, 사주, 삼각주, 하구퇴적층, 발달사, 발달 기작

Abstract

We present basic data for developing new research topics and closely examine the existing data on the development and organization of the Nakdong River Estuary Delta by analyzing various studies of the area, including ocean engineering, coastal engineering, ocean environmental engineering, geomorphological, and geological studies. We first defined the general concepts related to the estuary and delta and reviewed the historical development of the Nakdong River Estuary Delta over the past 100 years. We then examined the origin and core elements of the estuary deposits that constitute the delta. In addition, we scrutinized the main factors affecting the development of the delta and analyzed existing research on delta development mechanisms by core researchers. The construction of an estuary barrage is one of the main factors effecting estuarine circulation and has altered the physical oceanic environment, area of deposition, atmospheric environment, and vegetation community of the delta. These factors affect the estuary circulation in turn, altering the delta. Along the Nakdong River, an unsteady-state sandy barrier appears at approximately three times the distance of the wavelength of incident offshore waves, and this terrain forms approximately 10-15 years after reclamation in the interdistributary upper stream and transforms the shoreline. It is necessary to develop a technique to predict terrain change that reproduces the erosion and accumulation of estuarine deposits. To determine the parameters and variables necessary to reproduce this system, continuous on-site monitoring is necessary. The existing research did not fully examine the terrain changes in Nakdong River Estuary or the periodic developmental characteristics. To understand the future process of estuary delta development, it is necessary to establish an integrated management system.