EFFECTIFITY STUDY OF COAST STRUCTURE IN PEKALONGAN CITY BEACH

• Main Author: KUSLI (NIM 95006005); Pembimbing: Dr. Ir. S. Legowo dan Dr.Ir. Syamsudin, Dipl. HE., MUHAMMAD
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/13684
• Institution: Institut Teknologi Bandung

Erosion are the most significant factor that causing of shoreline decline. Erosion was occurred at a location, if amount of sediment transport along shoreline that inside is more little than amount of sediment transport along shoreline that go outside. Sediments move along surf zone, starting from the break of wave to the shore, due to the presence of alongshore current. This occurs because of the presence of wave cumin from the offshore have form an angle to normal line of shoreline. In Pekalongan City shoreline, the sediment littoral occurring is 6.781 m3 per year which direction from east to west. <br /> <br /> <br /> <br /> <br /> There are two kinds of safety coast structures in Pekalongan city, seawall as far as 2.800 m at Sari beach (at west from fishery port), and two units breakwater offshore at Slamaran beach (at east from fishery port), which each length 150 m. The function of these structures to stop erosion that occurred at Sari beach and Slamaran Beach. The cause of erosion at Pekalongan Beach is obstructed the sediment littoral transport by jetty at Pekalongan river, and estuary of kali Banger. These structures have successes to stop erosion at location which have been protected, even have shaped salient/tombolo form at behind of breakwater until adding occurred of mainland wide. However some part of the unprotected shoreline is still eroded, namely at Sari beach as far as 1300 in (west beside from seawall), and Slamaran beach as far as 900 in (west beside from breakwater), until threaten settlement area, dyke and tourism area. Through the study, will be studied the causing of erosion in Pekalongan City, and cffectifity function of coast structures until can be choused the strategy that comprehensive ID take care the shoreline, with concept to return shoreline condition that have been eroded, and keep the stability of shoreline position concordant with planning and support development of tourism. Additional breakwater offshore with adding supply sediment, it is the best solution to take are erosion problem, and have been proven with shaped salient/tombolo form at behind dw structures of breakwaters offshore. Using of parabolic form methods can be predicted. <br />