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A study on coastal erosion and deposition processes in Subang, Indonesia
Kikuyama S.a, Suzuki T.a, Sasaki J.b, Achiari H.c, Soendjoyo S.A.c, Higa H.a, Wiyono A.c
a Graduate School of Urban Innovation, Yokohama National University, Hodogaya, Yokohama, 240-8501, Japan
b Graduate School of Frontier Sciences, University of Tokyo, Chiba, Kashiwa, 277-8563, Japan
c Ocean Engineering Study Program, Institut Teknologi Bandung, Lb. Siliwangi, Coblong, Kota Bandung, Jawa Barat, 40132, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2018 World Scientific Publishing Co. Pte. Ltd.A coastal land area of approximately five km2 around the Pondok Bali beach in Subang, Indonesia, has been lost to the sea for the past decade. Before this land loss, there were several fish ponds with mangrove trees. The local people have suffered from the relative sea level rise, as they have had to abandon their houses because of the frequent inundations. To understand the status and causes of this coastal problem, the perception and adaptation strategies of the people, and potential countermeasures, we performed interview surveys in the associated villages and local governments. By using a sea chart of 1965 and satellite images, we calculated the cumulative volume change of deposition and erosion around the Cipunagara River mouth areas, where Pondok Bali is situated. Further, we conducted field measurements of turbidity and velocity, as well as bathymetry in the Cipunagara River to estimate the sediment supply. From the interviews, we found that a decrease in sediment discharge is a major cause of the erosion around Pondok Bali, which is due to the change of the river channel in 1965, when a floodway was constructed. At the present river mouth, a huge river delta has been formed owing to the sediment supply from the river. We also found that the local villages and governments have been considering countermeasures for reducing land erosion and promoting sustainable land use in the Pondok Bali areas, such as a plan for creating a new branch off from the main channel of the river to the Pondok Bali areas. However, further discussion on the new branch route is required among the associated villages because the effect of the new branch on Pondok Bali is unknown. From the field survey in the river, we calculated the sediment flux and estimated the total sediment supply to the river mouth, and this information is used for assessing the feasibility of the plan.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Adaptation strategies,Coastal erosion,Mangrove,Relative sea level rise,River channels,River deltas,Sediment discharge,Sustainable land use[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Change of river channel,Coastal erosion,Mangrove,River delta,Sediment transport[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This study was partially funded by JSPS KAKENHI (Grant No. 25303016) and the Strategic Research Foundation Grant-aided Project for Private Universities from MEXT (Tomoya Shibayama, Waseda University, No. S1311028).[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1142/9789813233812_0046[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]