T. Mizuyama

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Martin J Bunch

York University

Fabio Zanasi

University College London

Viacheslav Kuleshov

Stockholm University

Jana August

Zentrum für Literatur- und Kulturforschung, Berlin

Vikram M . Agone

North Maharashtra University,Jalgaon

Annabelle ALLOUCH

Université de Picardie Jules Verne

Zdena Dobešová

Palacky University, Olomouc

Edmilson Teixeira

Universidade Federal do Espirito Santo

Harvey Farberman

SUNY: Stony Brook University

Mart Min

Tallinn University of Technology

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Papers by T. Mizuyama

Computer simulation of debris flow depositional processes

IAHS-AISH publication, 1987

Effects of bedrock groundwater on landslide occurrences in a steep headwater catchment

Previous studies have shown that the formation of groundwater in the soil mantle greatly affects ... more Previous studies have shown that the formation of groundwater in the soil mantle greatly affects slope instability on steep landscapes. To predict landslides, mathematical models based on a geographic information system, which organize geographic data such as information on upslope contributing areas and the local slope gradient, have been developed and tested. Although such models can be used to calculate the topographically driven convergence of rainwater and groundwater table developments in the soil mantle, thus providing a spatially distributed prediction of landslide occurrences, the accuracy of these mathematical models is still limited, mainly because they ignore storm responses in underlying bedrock. Recent research has provided credible information on the importance of bedrock groundwater on surface hydrological processes in headwater catchments. To elucidate the effects of bedrock groundwater, the dynamics of bedrock groundwater should be measured directly. However, inten...

Technical standard for the measures against debris flow(draft)

土木研究所資料, 1988

Chronology of alluvial sediment using the date of production of buried refuse: A case study in an ungauged river in central Japan

ABSTRACT

Observation of 2-dimensional root system development and soil water distribution in a root box

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Flume tests for bed erosion control by combination of a main and a counter sabo dam

Scour and Erosion IX, 2018

Development of a bedload sensor for continuous measurement and its applicability

Temporal and spatial variations in the probability of debris flow initiation in volcanic watersheds

Journal of the Japan Society of Erosion Control Engineering, 2005

Abstract; Information on the time and location of debris flow initiation is essential for plannin... more Abstract; Information on the time and location of debris flow initiation is essential for planning preventive measures and evacuation systems. To predict the time and location of debris flow initiation, we applied a method that combines the kinematic wave method and the index proposed by Takahashi (1978). The method was tested with data from the Boyong River at Merapi Volcano, Indonesia, and the Nojiri River at Sakurajima Volcano, Japan. A new diagram was also developed to show temporal and spatial variations in Takahashi&amp;#x27;s index ...

Generation of a saturated zone at the soil–bedrock interface around a tree on a hillslope

Effect of Hydrotropism on Root System Development in Soybean (Glycine max): Growth Experiments and a Model Simulation

Journal of Plant Growth Regulation, 2002

ABSTRACT To observe root system development, soybean plants (Glycine max) were grown in root boxe... more ABSTRACT To observe root system development, soybean plants (Glycine max) were grown in root boxes that were set horizontally to reduce the effect of gravity. Along with the root system development, the two-dimensional distribution of soil water content in the root boxes was measured continuously by the time domain reflectometry (TDR) method. Root system development and its morphological architecture were strongly affected by the positions of the water supply. It is suggested that root hydrotropism plays the dominant role in root system development. In addition to root hydrotropism, the importance of root compensatory growth is suggested. A combined model of root system development and soil water flow considering root hydrotropism and compensatory growth was used to simulate root system development and soil water flow. The morphological architecture of root systems and the distribution of soil water content obtained in the experiment were successfully explained by the model simulation. These results confirmed that root hydrotropism and compensatory growth are dominant factors in root system development under a reduced effect of gravity. The validity of the model was confirmed, and its applications for various purposes were suggested. KeywordsRoot system development–Root box–Model–TDR–Coil type probe–Hydrotropism–Compensatory growth

Built-In Terraced Fish Ladders for Sabo Dams

Proceedings of the International Symposium on Fishways 95, 1995

Although the fish ladders for low drop structures, called groudsels, generally work relatively su... more Although the fish ladders for low drop structures, called groudsels, generally work relatively successfully, those for use in a sabo dams can not necessarily be easily built because those fish ladders for sabo dams are too high. It is practically impossible to build such fish ladders that work effectively after sedimentation starts in sabo dams before the sabo dams are filled with sediment. In this report, is proposed a new fish ladder for sabo dams that work effectively even before sedimentation starts afterward as well. It is a built-in terraced fish ladder. This fish ladder has windows on both of its side walls. The key to the success of this new fish ladder lies in whether or not an appropriate slope is selected. The flow in this new fish ladder was examined using hydraulic test models with and without sediment. The idea would seem promising, although no field examination has yet been carried out on those built-in terraced fish ladders in sabo dams where fish actually freely sail

Soil erosion in the Republic of Moldova - the importance of institutional arrangements

IAHS-AISH publication, May 30, 2003

Sediment yield estimation and check dams in a semiarid area (Sierra de Gádor, southern Spain)

Erosion prediction in ungauged basins: integrating methods and techniques. Proceedings of an international symposium, Sapporo, Japan, 8-9 July 2003., 2003

The carbonate massif of the Sierra de Gâdor (southern Spain) constitutes the natural recharge are... more The carbonate massif of the Sierra de Gâdor (southern Spain) constitutes the natural recharge area of the Campo de Dalias aquifer system. The Campo de Dalias is a semiarid area covered by 20 000 ha of greenhouses yielding significant economic returns. The uncontrolled development of this agricultural activity has produced an increase in the risk of flooding. In 1977 the Spanish authorities carried out a soil and vegetation restoration programme that included the construction of 107 check dams. The effectiveness of the check dams in trapping sediment has been evaluated in the present study. The calculated sediment yield is 50 mJ km"2 year"1, although in some basins values of nearly 2100 m3 km"2 year"1 have been estimated. These results show the usefulness of check dams, which are numerous in the Mediterranean region, as a tool for quantifying water erosion in small, ungauged basins.

Land-use based GIS-modelling for sedimentation reduction at Bili-Bili Dam, Indonesia

Erosion prediction in ungauged basins: integrating methods and techniques. Proceedings of an international symposium, Sapporo, Japan, 8-9 July 2003, 2003

... no. 279. 2003. Land-use based GlS-modelling for sedimentation reduction at Bili-Bili Dam, Ind... more

Physically-based mathematical formulation for hillslope-scale prediction of erosion in ungauged basins

Erosion prediction in ungauged basins: integrating methods and techniques. Proceedings of an international symposium, Sapporo, Japan, 8-9 July 2003., 2003

Erosion Prediction in Ungauged Basins: lntegrating Methods and Techniques (Proceedings of symposi... more

Method for estimation of the delivery of sediments and solutes from Greenland to the ocean

Greenland is the largest island in the world, with an area 2 415 100 km" and a smoothed coas... more Greenland is the largest island in the world, with an area 2 415 100 km" and a smoothed coastline length of 7500 km, bordering the Atlantic Ocean, the Arctic Ocean and the sea between west Greenland and Canada. Very few gauging stations at which discharge is measured are located in this huge area, and the dissolved and sediment load are monitored at even fewer stations. Estimating the supply of sediment and solutes to the surround ing seas is therefore in reality a case of estimating loads from an ungauged area. This presentation discusses methods for estimation, and presents prelim inary estimates of loads. BACKGROUND AND SCOPE Greenland stretches from 60 to 84°N, with an area of 2 415 100 km2, of which 75% is covered by the Greenland Ice Sheet. Around the Greenland Ice Sheet, a narrow band of land is found with a width that reaches up to approximately 200 km. In several places, ice lobes from the Greenland Ice Sheet reach the open sea directly, whereas in other places the i...

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Identification of sources of sediment to Lake Samsonvale (North Pine Dam), southeast Queensland, Australia

Lake Samsonvale (North Pine Dam, NPD) is a major reservoir, of approximately 22 km 2 with a capac... more Lake Samsonvale (North Pine Dam, NPD) is a major reservoir, of approximately 22 km 2 with a capacity of 215 000 Ml and drainage area of 347 km2, which supplies drinking water to Brisbane, the capital city of Queensland in eastern Australia. Historically, there are large and persistent blooms of potentially toxic cyanobacteria in NPD, and it was hypothesized that their occurrence and biomass were related to input of sediment-boun d phosphorus from the drainage basin. The NPD drainage basin is ungauged and few estimates of (sub)drainage basin sediment loads exist. This paper develops a Bayesian approach utilizing endmember models to estimate, based on major and trace element geochemical signatures, the proportion of various drainage basin sediment sources in sediment samples taken from NPD. This approach not only allows for the incorporation of prior knowledge about the geo chemical composition of the sources (or endmembers), but also allows for correlation between spatially contiguo...

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Mathematical model for predicting soil erosion by flowing water in ungauged watersheds

A model was developed for estimating soil erosion by flowing water in ungauged watersheds from fo... more A model was developed for estimating soil erosion by flowing water in ungauged watersheds from four parameters: slope; annual rainfall; clay content; and vegetation cover. The mathematical model is: soil erosion (t ha) = 41.73 + 0.181 × slope (%) + 0.046 × rainfall (cm) – 0.387 × clay (%) – 8.125 × vegetation cover factor. The vegetation cover was ranked on a scale of 1 to 5, 1 being bare soil surface, and 5 the extremely dense forests with trees, bushes and grasses. The model was applied to the data obtained from gauged watersheds during subsequent years for validity and was found quite effective in estimating soil erosion by water. However, further investigations are required to refine the model. Furthermore, because the gauged watersheds comprise only a minute fraction of the total ungauged area of the region, estimating soil erosion estimation necessitates spatial extrapolation on a spatial and temporal basis.

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Reliability evaluation of rainfall-sediment-runoff models

This paper proposes a method of evaluating model reliability based on a Monte Carlo simulation te... more This paper proposes a method of evaluating model reliability based on a Monte Carlo simulation technique, and applies it to distributed rainfall- sediment-runoff models with different complexity in the rainfall-runoff processes. The proposed evaluation method indicates that the model dealing with subsurface flow and surface flow is the most reliable among the three models for the Lesti River basin, for which hourly rainfall discharge sequences are available. By using the evaluated rainfall-runoff process models, sediment erosion and transportation in the Lesti River basin are simulated.

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Measurement of Bed Load Using Hydrophones in Hydraulic Model Experiments

PROCEEDINGS OF HYDRAULIC ENGINEERING, 2004

Recently, in order to obtain basic data for the integrated management of the sediment transport i... more Recently, in order to obtain basic data for the integrated management of the sediment transport in a river basin, several monitoring of the bed load by indirect estimation in actual rivers called the hydrophone method have been conducted and examined for practical use. In hydraulic model experiments to evaluate the function and efficiency of installing sabo facilities in rivers, the bed load is measured by trapping directly the sediment using boxes, sieves, etc.

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Computer simulation of debris flow depositional processes

IAHS-AISH publication, 1987

Effects of bedrock groundwater on landslide occurrences in a steep headwater catchment

Technical standard for the measures against debris flow(draft)

土木研究所資料, 1988

Chronology of alluvial sediment using the date of production of buried refuse: A case study in an ungauged river in central Japan

ABSTRACT

Observation of 2-dimensional root system development and soil water distribution in a root box

Download

Flume tests for bed erosion control by combination of a main and a counter sabo dam

Scour and Erosion IX, 2018

Development of a bedload sensor for continuous measurement and its applicability

Temporal and spatial variations in the probability of debris flow initiation in volcanic watersheds

Journal of the Japan Society of Erosion Control Engineering, 2005

Generation of a saturated zone at the soil–bedrock interface around a tree on a hillslope

Effect of Hydrotropism on Root System Development in Soybean (Glycine max): Growth Experiments and a Model Simulation

Journal of Plant Growth Regulation, 2002

Built-In Terraced Fish Ladders for Sabo Dams

Proceedings of the International Symposium on Fishways 95, 1995

Soil erosion in the Republic of Moldova - the importance of institutional arrangements

IAHS-AISH publication, May 30, 2003

Sediment yield estimation and check dams in a semiarid area (Sierra de Gádor, southern Spain)

Erosion prediction in ungauged basins: integrating methods and techniques. Proceedings of an international symposium, Sapporo, Japan, 8-9 July 2003., 2003

Land-use based GIS-modelling for sedimentation reduction at Bili-Bili Dam, Indonesia

Erosion prediction in ungauged basins: integrating methods and techniques. Proceedings of an international symposium, Sapporo, Japan, 8-9 July 2003, 2003

... no. 279. 2003. Land-use based GlS-modelling for sedimentation reduction at Bili-Bili Dam, Ind... more

Physically-based mathematical formulation for hillslope-scale prediction of erosion in ungauged basins

Erosion prediction in ungauged basins: integrating methods and techniques. Proceedings of an international symposium, Sapporo, Japan, 8-9 July 2003., 2003

Erosion Prediction in Ungauged Basins: lntegrating Methods and Techniques (Proceedings of symposi... more

Method for estimation of the delivery of sediments and solutes from Greenland to the ocean

Download

Identification of sources of sediment to Lake Samsonvale (North Pine Dam), southeast Queensland, Australia

Download

Mathematical model for predicting soil erosion by flowing water in ungauged watersheds

Download

Reliability evaluation of rainfall-sediment-runoff models

Download

Measurement of Bed Load Using Hydrophones in Hydraulic Model Experiments

PROCEEDINGS OF HYDRAULIC ENGINEERING, 2004

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