Effects of riverbed deformation on the dynamic modeling of riparian vegetation succession and its application for river management

[2nd International Workshop on Sediment Bypass Tunnels = 第2回排砂バイパストンネルに関する国際ワークショップ] May 9-12, Kyoto-Japan, 2017.特定研究集会: 29C-01Recently, riparian zone of East Asian rivers are intensively forested, which provides a number of problems in the river management especially at the downstream of dams (Asaeda et al. 2012, 2015a). One of the major causes is likely the reduction of sediment in the river channel. Hence, sediment bypass tunnels, which transport sediment from the upstream to the downstream reach of a dam, may have a potential to reduce impacts of the structure in the channel. Under this background, a dynamic riparian vegetation model (DRIPVEM) is developed to predict the colonization and succession of vegetation in a river channel, aiming to predict the vegetation succession in the downstream of a sediment bypass tunnel (Asaeda et al. 2012b, Sanjaya and Asaeda 2017). After the validation on the vegetation succession with observed data using measured morphological data of several rivers, then the model is combined with the 2-dimensional river bed deformation model, and is applied to the targeted river (i.e. Kuzuryugawa (river) in Fukui, Japan) to obtain the effects of the morphological change of the river channel on the vegetation patterns after a flood. The comparison of trials with and without the bed deformation model indicated that morphological change during the flood period has a substantial effect on the vegetation pattern after a flood. Furthermore, simulations were conducted for the future condition of vegetation, showing possible wide applications of the present model for river management works

Mouthwash-Based Highly Sensitive Pyro-Genotyping for Nine Sexually Transmitted Human Papilloma Virus Genotypes

Human papillomavirus (HPV) is a common sexually transmitted infection worldwide, which spreads via contact with infected genital, anal, and oral/pharyngeal areas (oral sex) owing to diverse manners of sexual intercourse. In this study, we devised an oral HPV detection method using mouthwash waste fluids that causes less psychological resistance to visiting the outpatient otolaryngology departments. We successfully detected only the specific unique reverse sequencing probe (using pyro-genotyping) and identified the nine genotypes of HPV targeted for vaccination by pyrosequencing the mouthwash waste fluids of non-head and neck cancer patient volunteers (n = 52). A relatively large number (11/52) of mouthwash waste fluids tested positive for HPV (21.2%; genotype 6, n = 1; 11, n = 1; 16, n = 1; and 18, n = 8). These results surpassed the sensitivity observed testing the same specimens using the conventional method (1/52, 1.9%). Our method (pyro-genotyping) was developed using nine HPV genotypes targeted for vaccination and the results were highly sensitive compared to those of the conventional method. This less expensive, high-throughput, and simple method can be used for detecting oral HPV infection with fewer socio-psychological barriers