The Hydrotech Research Institute (HRI) is affiliated with the College of Engineering and the College of Agriculture, National Taiwan University (NTU). The HRI evolved from the Taipei Hydraulic Research Laboratory, which was first jointly managed by the NTU and the Ministry of Economic Affairs from 1950 to 1961. After 1961, the Laboratory came under the sole proprietorship of the University, and was known as the NTU Hydraulic Research Laboratory until 1997, when it assumed the present name. The HRI has dedicated for years to research in advanced hydroscience. It has also offered a fine environment to nurture talents of high expertise.


The objectives of the HRI include the followings: assist graduate and undergraduate teaching; conduct hydraulic and fluid-mechanic experiments; pursue hydraulic modeling studies -- physical, numerical, and analytical; perform academic research in water issues, particularly those related to Taiwan; and provide continue education and extension service.


The Director of the HRI heads the Institute in management of daily administration and research tasks, and supervises over fellow researchers and engineers in execution of research projects. Twenty-five professors from the Departments of Civil Engineering and Bioenvironmental Systems Engineering form the core of the research team that maintains continuous outflow of research results as well as enriches and elevates its research quality. Organizationally, the HRI consists of three sections: Teaching, Research, and Extension Services. Their functions are outlined as follows:


A. Aids in Teaching
1. To compile and strengthen teaching materials for the undergraduate and graduate curriculums.
2. To upgrade the facilities for laboratory courses and update the visual-aid system for experiments by which to enhance teaching quality.
3. To improve experimental facilities and research environments for the research work associated with theses of graduate students.

B. Academic Research
1. To steer, in view of the inherent characteristics prevailing in the hydraulics of Taiwan, research directions to the areas such as: (1) river hydraulics, (2) hydromechanics of hydraulic structures, (3) reservoir sedimentation, and (4) hydrologic/stream forecasting.
2. To promote scholarly exchange and cooperation with international hydraulic laboratories.
3. To sponsor symposia, conferences, lecture series, seminars, and workshops.

C. Extension Services
1. Hydraulic analyses: Include hydromechanic analyses of hydraulic structures, river mechanics, movable-bed flow computation, and flood inundation simulation.
2. hysical model tests: Include hydraulic structure, river engineering, dam engineering, reservoir sedimentation, surface runoff, surface erosion, debris flow, and so forth.
3. Hydrologic analyses: Include precipitation-data analysis, rainfall-runoff simulation, hydrologic monitoring system, and the like.
4. Water resources system analyses: Include reservoir operation, conjunctive use of surface and ground water, watershed management, hydrologic information system, and the like.
5. Numerical model developments: Include numerical methods and analyses, programming aspect of model development, engineering aspect of model development, prototype modeling and simulation, unsteady-flow modeling, development of forecasting systems, advanced modeling techniques, etc.
6. Other modeling studies: Include analog modeling, analytical modeling, and instrumentation for monitoring, modeling, and simulation.


A. Teaching Facilities
1. Experimental facilities for basic fluid-mechanics courses: Over 20 items of instruments and apparatus, such as metacentric height apparatus, laminar flow analyzer, etc., are provided in undergraduate instruction.
2. Experimental facilities for the intermediate fluid-mechanics course:
l Apparatus for surge and water hammer,
l Wind tunnel,
l Seepage apparatus,
l Cavitation apparatus.
Other items are also provided for graduate students.
3. Audio-Visual Equipment The HRI has in its possession 18 high-quality educational tapes in conjunction with a three-barrel projector, and other special audio-visual facilities, for instructional aids to fluid mechanics and hydraulics.

B. Library
The library of HRI serves as the literature/data depository for water science and engineering. Currently it holds over 3,000 volumes of books and articles, approximately 4,500 reports (of which about 450 published by HRI), more than 400 Ph.D./M.S. theses, and other reference materials.

C. Computing Facilities
1. Hardware
l Mini computers and work stations: 5 sets of SUN Spar work stations, and a set of Silicon graphic work stations are available for computing and modeling work.
l Network system
l Personal computers: The HRI presently has over 60 sets of 486 and higher class PCs.
l Satellite display system.
l Global positioning system.
2. Software l Geographical information system: ARC/INFO l Active visualization system: AVS l Administrative computer system
l Sets of HRI-staff-developed computer software and numerical models.

D. Experimental sites, flumes, and equipment
1. Sites
The HRI is located on the main campus of the university, facing Chow-Shan Road, and consists of a four-story main building, an old annex building, and outdoor experimental grounds. The main building has the ground space of about 4,000 m2, being filled with a fluid-mechanics classroom, an audio-visual classroom, library, office spaces, etc. The annex building occupies 800 m2 indoor space to house indoor experimental grounds, including an inlet testing setup, a debris-flow experimental quarter, a density-current experimental sector, a re-circulation flume, and some office space. Adjoining the two buildings lie four outdoor units of experimental grounds: a velocity-meter calibration flume, east experimental area, west experimental area, and a channel-bend experiment court. Since 1997, two outdoor units away from the campus have been established to provide more facilities for physical modeling.
2. Flumes
There are 11 flumes in HRI;
l The Large Flume: Adjustable slope, suitable for experiments on fixed-bed as well as movable-bed channel flows.
l The High-precision Flume: Adjustable slope, available for use with laser doppler measurements.
l Other Flumes: Nine other flumes are available for specific studies such as high-velocity flow, density-stratified flow, sediment transport, waves, etc.
3. Instrumentation
l Precision measurement instruments, including 2-D laser doppler velocimeter, laser sheet and image processor.
l There are more than 100 items of instruments for general use in hydraulic laboratory work.


A. Teaching and Research
1. Four classes of fluid-mechanics experiments each year are held in HRI for students of the Departments of Civil Engineering and Bioenvironmental Systems Engineering. In addition, the graduate students of Civil Engineering also use the facilities for conducting intermediate fluid-mechanics experiments. In recent years, approximately 160 students use its facilities annually.
2. The HRI also renders graduate students the facilities for their research work. Several tens of master and doctoral theses have relied on the HRI facilities for their completion.
3. In the past three years, the HRI has accomplished over 100 projects of basic researches, with their main topics coming from:
l Hydraulics,
l Hydraulic Structures,
l Sediment Transport,
l Hydrology,
l Fluid Dynamics,
l Multidisciplinary Areas.

B. Extension Services
1. Development of simulation models:
l For hydraulic analysis: Models for unsteady river/estuary flow; models for unsteady flows in channel network, in 2-D water bodies, etc.
l For sediment transport: Alluvial channel, sediment transport models; reservoir sedimentation, etc.
l For Hydrologic analysis: Rainfall frequency analysis; catchment hydrology models.
l For drainage analysis: 2-D flood inundation model, drainage system model, etc.
2. Completion of sponsored projects: Through the years, the HRI has executed and completed about 300 projects sponsored by government agencies and private sectors.
3. Workshops/Seminars:
l Open-channel hydraulics
l Flood routing in river channels
l Hydrologic analysis
l Reservoir operation
l Water-quality modeling


A. On Teaching
1. Addition of educational video tapes for experiments/ teaching
2. Promotion of computer-aided experiments, teaching and project execution.
3. Strengthening the intermediate fluid mechanics experiments.

B. On Research
1. Experimental research: With laser doppler velocimetry and imagery processing equipment, precision experiments can be conducted in various research areas.
2. Numerical modeling: With the past achievements in numerical modeling, and with the fast-advancing computer science and technology in Taiwan, the future outlook of research by numerical modeling appears very bright.

C. On Extension Services
1. Hydraulic analysis: Expectation is the intensification of the effort to promote use, as well as development, of numerical models for analysis of the critical problems that will confront Taiwan in the future, such as reservoir sedimentation, river channel stability, flood forecasting, analysis, and control, debris flow, and so forth.
2. Hydrologic analysis: Demands are increasing for dessemination of hydrologic analysis models for use in organizing and classifying hydrologic data in Taiwan, and for hydraulic engineering planning, design and operation.
3. Water resources system analysis: It will be increasingly important to promote use of up-to-date techniques for water-resources system analysis, with which to assist decision making in problems such as water distribution, reservoir operation, etc., in accordance with the state of water-resources deficiency and ill-distribution in Taiwan.
4. Compilation of water resources problems: Compilation of information and data concerning water-resources problems of Taiwan, including social, economical, institutional, legal, and other aspects, will be carried out. From such compilation, prospective schemes and measures for solution may be derived and suggestions offered for government decision making.

D. On Cooperation
To enhance cooperation with internationally-known institutes for technical information exchange, arrangements will be made from time to time to invite scholars and specialists world wide to the HRI for collaborative researches and/or lectures.