**A. Appendix**

**Figure A1.**

until 2007 with reference to 1967. The predicted and measured shoreline changes

**Figure 18** shows the distribution of longshore sand transport in the entire study area. Between 1899 and 1929, sand supplied from the Hino River was transported to both directions away from the river mouth with the westward and eastward transport

respectively. With the decrease in sand supply from the Hino River, the longshore sand transport had decreased from the vicinity of the river mouth. In particular, the westward longshore sand transport markedly decreased after the construction of the DBs between 1967 and 1973 in the area between *x* = 0 and 3 km. East of the river mouth, eastward longshore sand transport at the initial stage reversed until 1967, and

The topographic changes of the Yumigahama Peninsula between 1899 and 2010 have been reproduced using the contour-line-change model considering the change in grain size of the seabed material. It was found that the beach changes of this peninsula were involved in the process leading to the reduction in the size of the Hino River delta, and strong erosion occurred around the river mouth. Because countermeasures were carried out from up the coast, sand was deposited up the coast of various structures with erosion down the coast. It was concluded that the contour-line-change model considering the change in grain size of the seabed material is a useful tool for predicting long-term topographic changes.

/year out of the entire sand supply of 4.7 105 m3

/year,

*6.2.3 Comparison between measured and calculated shoreline changes*

*Sedimentary Processes - Examples from Asia,Turkey and Nigeria*

westward longshore sand transport began to occur after 1967.

agree well.

**Figure 18.**

of 3.6 105 and 1.1 105 m3

*Distribution of longshore sand transport rate.*

**7. Conclusions**

**82**

*Bathymetric changes until 1947, 1962, and 1967 with reference to bathymetry in 1920. (a) Bathymetric changes between 1920 and 1947. (b) Bathymetric changes between 1920 and 1962. (c) Bathymetric changes between 1920 and 1967.*

**Author details**

, Shiho Miyahara<sup>2</sup>

1 Public Works Research Center, Tokyo, Japan

provided the original work is properly cited.

2 Coastal Engineering Laboratory Co., Ltd., Tokyo, Japan

\*Address all correspondence to: miyahara11@gmail.com

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

*A Long-Term Prediction of Beach Changes around River Delta using Contour-Line-Change Model*

*DOI: http://dx.doi.org/10.5772/intechopen.85207*

\*, Toshiro San-nami<sup>2</sup> and Masumi Serizawa<sup>2</sup>

Takaaki Uda<sup>1</sup>

**85**

**Figure A2.** *Bathymetric changes with reference to bathymetry in 1947. (a) 1962. (b) 1967. (c) 1980. (d) 1995. (e) 2010.*

*A Long-Term Prediction of Beach Changes around River Delta using Contour-Line-Change Model DOI: http://dx.doi.org/10.5772/intechopen.85207*
