YAJIMA Hiroshi

J-GLOBAL         Last updated: Dec 2, 2018 at 13:29
 
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Name
YAJIMA Hiroshi
Affiliation
Shimane University
Section
Organization for Research and Academic Information, Estuary Research Center
Degree
Doctor(Engineering)(Kyoto University)

Research Areas

 
 

Academic & Professional Experience

 
1996
 - 
2002
Research Associate, Faculty of Engineering,
 
 
   
 
Tottori University
 
2002
   
 
- Associate Prefessor, Faculty of Engineering,
 
 
   
 
Tottori University
 

Education

 
 
 - 
1996
Department of Global Environmental Engineering, Graduate School, Division of Engineering, Kyoto University
 
 
 - 
1988
Department of Civil Engineering, Faculty of Engineering, Kyoto University
 

Awards & Honors

 
Sep 2015
Water Research誌 Outstanding Reviewer賞, International Water Association
 

Published Papers

 
Yuji Sakuno, Hiroshi Yajima, Yumi Yoshioka, Shogo Sugahara, Mohamed Abd Elbasit, Elhadi Adam, Johannes Chirima
Water   10(5) 618   May 2018   [Refereed]
矢島 啓, 眞鍋 幸嗣
水工学論文集 Annual journal of Hydraulic Engineering, JSCE   74(4) I_379-I_384-384   2018   [Refereed]
増木 新吾, 矢島 啓, 管原 庄吾
水工学論文集 Annual journal of Hydraulic Engineering, JSCE   62 Ⅰ_367-372   2018   [Refereed]
矢島 啓, 諸原 亮平, 川野 裕美
水工学論文集 Annual journal of Hydraulic Engineering, JSCE   73(4) I_955-I_960-960   2017   [Refereed]
HASHIMOTO Ken, YAJIMA Hiroshi
JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES   30(6) 356-372   2017
<p>&emsp;Flood damage from heavy rainfall is increasing recently, as Typhoon No. 12 in 2011 and the Kinu River flooding in 2015 demonstrate. Moreover, rainfall and flood discharge are expected to increase because of climate change. We specifically...
YAJIMA Hiroshi, MOROHARA Ryohei, KAWANO Hiromi
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   73(4) I_955-I_960   2017   [Refereed]
&nbsp;In order to know the transport process of Corbicula japonica in Lake Shinji, we conducted wave flume tests and field survey around the shore. The laboratory tests reavealed that we could apply sediment transport theory to the transpor...
YAJIMA Hiroshi
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   72(4) I_637-I_642   2016   [Refereed]
&nbsp;Artificial shallow areas are being developed around shoreline of Lake Shinji since 2000. Main purpose of the development is to restore deteriorated shorelines due to the construction of concrete revetments. It also may help the decrease of t...
IZUMIYA Takashi, YAJIMA Hiroshi, SUZUKI Tomoyuki
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   72(4) I_685-I_690   2016   [Refereed]
&nbsp;A selective withdrawal system (SWS) in a dam is essential for the conservation of water quality in the reservoir. However, the operation of SWS has not been fully examined in Japan so far. On the other hand, in the United States, some dams u...
YAJIMA Hiroshi, YAMAMOTO Shigetomo
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   71(4) I_775-I_780   2015   [Refereed]
The heat budget at water surface is composed of short- and long-wave radiations and latent- and sensible-heats. In this paper we improved the estimation of short- and long-wave radiations that have major effects on the water temperature change in ...
HASHIMOTO Ken, YAJIMA Hiroshi
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   71(4) I_487-I_492   2015   [Refereed]
We focus on the Probable Maximum Precipitation (PMP) over the Upper Tone River basin, through weather conditions change. In order to evaluate total amount and distributions of heavy rainfalls, WRF model is used. The results are summarized as follo...
Castelletti Andrea, Yajima Hiroshi, Giuliani Matteo, Soncini-Sessa Rodolfo, Weber Enrico
JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT   140(4) 496-510   Apr 2014   [Refereed]
CHOI Jungkyu, YAJIMA Hiroshi
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   70(4) I_1639-I_1644   2014   [Refereed]
We evaluated effects of selective withdrawal system (SWS) for water quality improvement adapted for climate change in the Urayama Reservoir. We applied a 3-D coupled hydrodynamic and ecological model of ELCOM-CAEDYM with four SWS operation scenari...
CHOI Jungkyu, YAJIMA Hiroshi, TANIGUCHI Kenji, MAGOME Jun
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   70(4) I_1633-I_1638   2014   [Refereed]
A 3-D coupled hydrodynamic and ecological model of ELCOM-CAEDYM was applied to Urayama Reservoir to study the effects of climate change on the thermal structure and water quality in the reservoir as well as those downstream. We evaluated the diffe...
HASHIMOTO Ken, YAJIMA Hiroshi, HOSOKAWA Tatsuya
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   70(4) I_547-I_552   2014   [Refereed]
We focus on the Probable Maximum Precipitation (PMP) in the Upper Tone River basin, through weather conditions change. In order to evaluate total amount and distributions of heavy rainfalls, WRF model is used. The results are summarized as follows...
Yajima Hiroshi, Choi Jungkyu
ECOLOGICAL ENGINEERING   58 180-191   Sep 2013   [Refereed]
HASHIMOTO Ken, YAJIMA Hiroshi, HOSOKAWA Tatsuya
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   69(4) I_331-I_336   2013   [Refereed]
We focus on the Probable Maximum Precipitation (PMP) over the Upper Tone River basin, through maximization of weather conditions. In order to evaluate vertical and horizontal distributions of weather conditions during heavy precipitations, Grid po...
CHOI Jungkyu, YAJIMA Hiroshi, TANIGUCHI Kenji, MAGOME Jun
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   69(4) I_1495-I_1500   2013   [Refereed]
This research investigates the effects of climate change on the thermal structure and water quality in Urayama Reservoir. We used downscaled meteorological and hydrological data of present period (year 2000) from JRA25 and future period (2060s) by...
YAJIMA Hiroshi, CHOI Jungkyu, TANIGUCHI Kenji
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   69(4) I_1489-I_1494   2013   [Refereed]
In this research, we evaluated errors of meteorological data generated by a dynamical downscaling using a regional weather forecast model of WRF from JRA25 data along with several bias-correction technique applications. Then we investigated uncert...
YAJIMA Hiroshi, YAMADA Yasuhiro, TOSHIMA Kuniaki
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   69(4) I_1411-I_1416   2013   [Refereed]
Tokyo Bay sometimes has hypoxia problems, which causes negative influences to the marine ecosystem. In order to improve the water quality in the Chiba Port, oxygenation systems which supply high dissolved oxygen (DO) water to the bottom of the por...
YAJIMA HIROSHI, CHOI JUNGKYU, HAMILTON DAVID
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   68(4) I_1645-I_1650   2012   [Refereed]
In order to evaluate the global warming effect on the water quality in a reservoir, we conducted sensitivity analysis as to the change of air temperature as well as its seasonal pattern at Urayama Reservoir in Arakawa River basin using a 3-D reser...
CHOI JUNGKYU, YAJIMA HIROSHI
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   68(4) I_781-I_786   2012   [Refereed]
Bypass tunnel is one of the important water quality management facilities in reservoirs. There are two types of bypass tunnels. One is bypassing turbid water and the other is bypassing clear water to the downstream of a reservoir. However, these s...
MASUKI Shingo, YAJIMA Hiroshi, SEIKE Yasushi
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   67(4) I_1525-I_1530   2011   [Refereed]
A field test of supplying oxygen-rich water into the bottom of dredged pits in Lake Nakaumi was performed in 2009. We used recently developed hypolimnetic oxygenators called WEP. In Yonago Bay, we selected two adjacent dredged pits, then installed...
KAJIKAWA Yuki, YAJIMA Hiroshi, Hinokidani Osamu
PROCEEDINGS OF HYDRAULIC ENGINEERING   52 1075-1080   2008
It is very important to predict the influence on the downstream from a dam reservoir by the effluent because of the river environmental protection of the future. In this paper, the stream temperature management system at the downstream from a dam ...
YAJIMA Hiroshi, KIKKAWA Sakae, ISHIGURO Jun
PROCEEDINGS OF HYDRAULIC ENGINEERING   51 1391-1396   2007   [Refereed]
A selective withdrawal system (SWS) is mainly used for the control of released water quality (e. g. temperature, SS, metals) released from a dam reservoir. Capacities of most Japanese dams are smaller than those of foreign countries. Therefore we ...
YAJIMA Hiroshi, KIKKAWA Sakae, ISHIGURO Jun
PROCEEDINGS OF HYDRAULIC ENGINEERING   50 1375-1380   2006   [Refereed]
A selective withdrawal system (SWS) is essential for the conservation of water quality in a dam reservoir. To make clear the desirable operation of SWS, we applied numerical simulations (the one-dimensional and the three-dimensional water quality ...
YAJIMA Hiroshi, KIKKAWA Sakae
PROCEEDINGS OF HYDRAULIC ENGINEERING   49 1135-1140   2005
Nowadays, a selective withdrawal system (SWS) in a dam is essential for the conservation of water quality in the reservoir. However, we cannot say that the operation of SWS has been fully examined in Japan. On the other hand, in the United States,...
YAJIMA Hiroshi, KIKKAWA Sakae, INAWAKA Takaharu
PROCEEDINGS OF HYDRAULIC ENGINEERING   49 1129-1134   2005
It has become very important to predict water temperature profiles correctly for simulating water quality in a reservoir. A one-dimensional water temperature simulation model called DYRESM, developed by CWR at the University of Western Australia i...
YAJIMA Hiroshi, ISHIGURO Jun, IMBERGER J&ouml;rg
Annual Journal of Hydraulic Engineering   48 1399-1404   2004
The field observation conducted in the summer of 2000 at Lake Koyama showed that there were some types of internal waves. In this study we simulated those data using ELCOM which is a three-dimensional hydrodynamics model developed by CWR, the Univ...
YAJIMA Hiroshi, HAYAKAWA Kazue
PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN   18 533-538   2002
Lake Koyama is a low salinity lake that is connected to the Japan Sea via Koyama River. The seawater inflow into the lake is controlled by a sluice gate set up in the river. In summer there is no seawater inflow because the lake water is used for ...
YAJIMA Hiroshi, HINOKIDANI Osamu, MICHIUE Masanori, SHIMIZU Takanori
PROCEEDINGS OF HYDRAULIC ENGINEERING   46 1001-1006   2002
Water temperature and flow velocity were measured at vertical multi-points by using thermistor chains and electromagnetic current meters in shallow Lake Koyama. The objective of the measurement is to clarify the flow characteristics under stratifi...
YAJIMA Hiroshi, MICHIUE Masanori, HINOKIDANI Osamu, UDA Yasuhiro
Annual Journal of Hydraulic Engineering   44 993-998   2000
In a brackish lake the occurrence of the density stratum by the vertical distribution of water temperature and salinity exerts an important influence on the water quality. Therefore. in a lake where there might be a occurring of strong density str...
MICHIUE Masanori, HINOKIDANI Osamu, YAJIMA Hiroshi
Annual Journal of Hydraulic Engineering   43 1067-1072   1999
In summer season, density stratum in shallow lakes can be often seen. Once the water has stratified layers, dissolved oxygen in the bottom layers could be easily lack and the water quality becomes worse. If new salt water intrudes into the bottom ...
YAJIMA Hiroshi, MICHIUE Masanori, UMEZAKI Masaaki
Annual Journal of Hydraulic Engineering   42 1-6   1998
The probable maximum precipitation (PMP) is very important in river planning. The traditional approach to PMP determination is mainly based on the moisture maximization of observed extreme precipitation amounts and its regional distribution is obt...
YAJIMA Hiroshi, TSUJI Motohiro, IKEBUCHI Shuichi, NAKAKITA Eiichi
Journol of Japan Society of Hydrology & Water Resources   9(2) 143-152   Mar 1996
YAJIMA Hiroshi, IKEBUCHI Shuichi, NAKAKITA Eiichi
Annual Jornal of Hydranlic Engineering   40 285-290   1996
It is important to know the probable maximum precipitation (PMP) for a river basin. But unfortunately the PMP is presently not known in Japan. In other countries PMP is generally estimated for a meteorologically homogeneous region, but in geograph...

Misc

 
Nomura Ritsuo, Kawano Shigenori, Yajima Hiroshi
The Quaternary Research (Daiyonki-Kenkyu)   48(5) 305-320   2009
We report on Difflugia, a brackish water thecamoebian, from low oligohaline Lake Koyama-ike. Its occurrence in a 66-cm sediment core taken from the southeast side of the lake enables us to reconstruct historical salinity changes. Diffl...
Hashimoto Ken, Hosokawa Tatsuya, Yajima Hiroshi
Proceeding of Annual Conference   25(0)    2012
In this study, we focus on probable maximum precipitation(PMP) for Japanese river basin, as following procedures.1.GPV data and Rader Amedas data are used for calculating precipitable water in several rainfall duration.2. Maximum values of atmosph...
HASHIMOTO Ken, YAJIMA Hiroshi
Proceeding of Annual Conference   28(0)    2015
We focus on the Probable Maximum<br>Precipitation (PMP) and Probable Maximum Flood (PMF) over the Upper Tone River basin<br>using WRF model, through weather conditions change. The results are summarized<br>as follows: (1) In the case of typhoons, ...
Field Measurment of lnternal waves and Flow Pattern under strafidied Conditions in Lake Koyama
Annual Journal of Hydraulic Engineering   46, 1001-1006    2002
Effects of treated Wastewater by Rural Sewage Containing Nutrient Salts on the Quality of River Water
Journal of River Engineering   7 203-208   2001

Conference Activities & Talks

 
Japanese water environment management and challenge of dam reservoir water quality management [Invited]
YAJIMA Hiroshi
Korea International Water Week   13 Sep 2018   

Works

 
Development of Total Simulation Model for a small Brackish Lake
1999
Phytoremediation in a dam reservoir
2002
dam reservoir and downstream water quality evaluation
2003

Research Grants & Projects

 
Study on PMP estimation
Study on environmental analysis of lakes
Method of Water Purification in a Lake
Water Environmental Problem in Dam