لینک مقالات زیر از سایت ایران هیدرولوژی به آدرس www.iranhydrology.com انتخاب شده اند:
ATMOSPHERE MODELING AND HYDROLOGIC PREDICTION UNCERTAINTY
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Some of the fundamental principles of Quantitative Precipitation Forecasts from operational numerical atmospheric models are briefly addressed. The attention is then focused on the relations among the QPF uncertainty, the sub-grid variability of the forecasted precipitation patterns and the uncertainty of the hydrologic prediction. Recognizing the fundamental deterministic nature of numerical models outputs, a few kinds of probabilistic parametrization for the forecasted precipitation are analyzed with the use of a conceptual non-linear hydrologic model...
HYDROMETEOROLOGICAL AND HYDRAULIC FACTORS AND
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Meteorological and hydrological aspects and hydraulic problems related to extreme floods, which occur in arid regions of Spain, are reviewed. Small coastal basins with steep slopes and little vegetation cover are characteristics of these regions in which "flash floods" develop. They are produced by large convective rainfall, resulting in very intense soil erosion and deposition. The flow in alluvial cones is basically two-dimensional, unsteady, and often supercritical. Using mathematical models that incorporate these features are typically prohibited because of the cost associate ...
more improvement in estimating more realistic runoff
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Abstrcts of 2002 Fall Meeting ON more improvement in estimating more realistic runoff amount.
چکيده مجموعه مقالاتي با عنوان بهبود برآورد رواناب سطحي
SELF-SIMILARITY AS A PHYSICAL BASIS FOR REGIONALIZATION OF FLOOD PROBABILITIES
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The self-similarity conjecture can provide an assessment of regionalization procedures for flood frequency analysis if the scaling properties of flood flows as parameterised by drainage area are considered. The question whether simple scaling can be used to discriminate among different flood probabilities in relatively small regions with high variability of climate and geomorphological features is investigated. Detailed simulations for a small basin in North-West Italy show that self-similarity or simple scaling properly represent the spatial variability of flood probabilities. ...
The geomorphological unit hydrograph
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The theory of GIUH discribed in this paper
PREDICTION AND MODELING OF FLOOD HYDROLOGY AND HYDRAULICS
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The basic principles underlying the most commonly used physically-based models of the rainfall-runoff transformation process are reviewed. A thorough knowledge of these principles is a pre-requisite for flood hazard studies and,
Specifications for reference frame fixing in the analysis of a EUREF GPS campaign
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The goal is to process GPS data in the commonly adopted ETRS89 system and taking full benefit of most recent fiducials or GPS ephemerides as provided by IGS. Basic principles has been agreed by the TWG to define the procedure described below. They can be summarized according to this way:
TIME AND SCALE RELATED PERSPECTIVES ON FAILURES IN WATER ENGINEERING
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
This paper will discuss what can be considered failures in water engineering, and for whom. An example of irrigation development from Argentina that was considered a failure in the short run, but proved to be highly successful in the longer run, will be the trigger from practice to start a discussion on the meaning of failure.
LESSONS FROM FAILURES OF IRRIGATION AND FLOOD CONTROL DAMS
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Dam constructions for irrigation or flood control have always had impact on the evolution and survival of human civilisations. Up to our times they were erected in areas, where the monthly fluctuation of water lead to the essential requirement of the construction of storages to secure a stable water supply to meet the demands of the population and of agriculture. The necessities of storages make obvious that the failures of such water systems not only included the destruction of dams but even have had long time impact on civilisation’s existence and to their circle of life.
STREAMSTATS: A U.S. Geological Survey web site for stream information
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
statistics, such as the 100-year flood and the 7-day, 10-year low flow, are needed for water-resources planning and management; for design of bridges, culverts, and flood-control structures; and for many other purposes. This paper describes the National Streamstats (STREAMSTATS) computer application currently in development by the U.S. Geological Survey for providing streamflow statistics to the public. STREAMSTATS works through a Web browser to provide various types of streamflow statistics for data-collection stations and for...
Relative Scales of Hydrodynamic and Geomorphologic Influence on the Hydrologic Response in the Illinois River Basin
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The Illinois River has been the focus of considerable interest within the state, and one of the main concerns has been the impact of human activity on the hydrological regime of the river [Kustra, 1997]. Interest has centered specifically on the effect of altered hydrologicregimes on floodplain ecosystems [Sparks, 1992]. Along with the human impacts, the ...
Uncertainty in the model parameters due to spatial variability of rainfall
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Most hydrologic/water quality (H/WQ) models that use rainfall as input assume spatial homogeneity of rainfall. Under this assumption this study assesses the variability induced in calibrated model parameters solely due to rainfall spatial variability. The AGNPS model and a network of 17 raingauges were used. Model parameters were estimated using rainfall observed at each gauge location, one at a time, as though that rainfall covered the entire catchment. A large uncertainty in the estimated parameters resulted from the spatial variability of rainfall. The uncertainty in the estimated para..
HYDRAULICS AND EFFECTIVENESS OF LEVEES FOR FLOOD CONTROL
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Levees have been used as a means of structural flood protection for several thousand years. Their effect and effectiveness have been debated periodically, most recently during and after the 1993 Mississippi River flood. Based on hydraulic principles, it can be shown that for a given flood levees raise the water stage in the leveed channel and upstream of it. On the other hand, they may slightly lower the water stage downstream. Methods for channel capacity determination and identification of low-capacity bottlenecks suitable for levee or channel improvement are...
STEERING GROUP FOR THE GLOBAL DIGITAL SEA ICE DATA BANK (GDSIDB)
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The first session of the Joint WMO/IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM) Expert Team on Sea Ice (ETSI) and the ninth session of the Steering Group for the Global Digital Sea Ice Data Bank (GDSIDB) were opened at 0930 hours on Monday, 21 October 2002, in the Regente Palace Hotel conference room by Mr Vasiliy Smolianitsky, chairman of the ETSI. Mr Smolianitsky welcomed participants and called on the Permanent Representative of Argentina with WMO, Comodoro Miguel Rabiolo, and Argentine IOC Alternate Represen..Javier A. Valladares, to address the meeting.
STATISTICAL ANALYSIS OF THE SPATIAL VARIABILITY OF VERY EXTREME RAINFALL IN THE MEDITERRANEAN AREA
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Natural hydrometeorological disasters in the Mediterranean region have occurred in the past essentially by outlying storm events characterized by considerable rainfall intensity and rare frequency. The characterization of this type of event is a crucial point in risk mitigation. Because of the rare occurrence of these extreme events they can be analyzed only on a regional frequency basis in order to reduce the uncertainty associated with parameter estimation at gauged sites and for risk assessment at ungauged sites. A statistical regional model includes: (i) a observed in the...
Nonlinear propagation of multi-scale dynamics throuth hydrologic subsystems
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Determination of the Probable Maximum Flood
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Guidelines is primarily intended to provide procedures for the development of the Probable Maximum Flood (PMF) for use in the evaluation of proposed and existing dams and other impounding structures. The purpose of these guidelines is to provide consistency in PMF determinations. The guidelines are not a substitute for good engineering judgment and experience when available data clearly call for a departure from recommended procedures. Therefore, the recommended procedures should not be rigidly applied in place of other justifiable solutions.
بررسي مقادير حداکثر بارش محتمل در 4 ايستگاه منتخب جنوب شرق ايران به روش آماري
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: فارسي
...بنا به تعريف حداکثر بارش محتمل يا پي ام پي بيشترين مقدار بارندگي است که در بازه زماني معين و در يک محل مشخص امکان رخداد آن وجود دارد. در نتيجه اين مقدار با تغييرات درازمدت و حصول آمار تغيير مي يابد...
Who drinks what: Potable Water Usage in South Australia
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Recent studies which have implicated mains supply water as a source of gastroenteritis (Payment et al, 1991; 1997), have ramifications for water supplies in Australia. This is particularly so for those water supplies in rural or semi -rural communities where the source water is often of a lower quality and its treatment limited. Rainwater collected and stored in tanks on domestic premises is an important source of potable water in South Australia. However knowledge about the risk to health from drinking tank rainwater is limited. Potential sources of contamination include...
AN INTEGRATED APPROACH TO USE MULTI-FUNCTIONAL ROLES OF PADDIES IN BASIN-WIDE FLOOD AND WATER-USE MANAGEMENT
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Historical and prospective direction of water management for floods is discussed and the functions of paddy areas are evaluated from the viewpoint of flood retention and mitigation in neighboring urban areas and its application to watershed management. Several rivers and examples of watershed management against floods are especially shown here, such as the Tone River (the largest basin area in Japan), the Rhine River in Europe, the Mississippi River of the United States, and the Mekong River in Asia. In the past, agricultural lands are regarded...
A WEB-BASED DECISION SUPPORT SYSTEM FOR BASIN PLANNING AND FLOOD MANAGEMENT IN THE RED RIVER BASIN
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The Red River Valley flood in 1997 was a significant natural event not witnessed in nearly 100 years. Geographically, this area once existed as a glacial lake. As the lake subsided, a prairie landscape of rich fertile soil remained, ideal for agriculture. However, due to the gently sloping nature of the basin (with a slope of less than 0.1 m per km over a distance of 872-river kilometers from source of the Red River at Wahpeton North Dakota to Lake Winnipeg), the area is prone to widespread overbank flooding from its main river, the Red River and its tributaries...
GEOCHEMICAL PROCESSES IN POLDERED FLOODPLAINS - CONSEQUENCES FOR AN INTEGRATED LAND AND WATER MANAGEMENT
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The hydrogeochemistry in the largest polder of the Oder river, named Oderbruch, is impacted by a permanent infiltration of water from the Oder into the aquifer below the alluvial loamy top layer of the polder. These exceptional hydraulic conditions are a result of hydro engineering measures taken more than 250 years ago. The goal of the investigation is a better understanding of the substance dynamics within the contact zone between the anaerobic ground water and surface water of a vast drainage system and the dynamic of the leaching processes ...conditions and gradients occur which
THE EXPERIENCE OF THE NILE FORECAST CENTER (NFC) IN MANAGING FLOODS AND SETTING STRATEGIES FOR KNOWLEDGE DISSEMINATION
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The Nile is a large, continental-scale river basin. Flows in the Nile originate almost completely outside Egypt. The primary information required are continuous forecasts of volumes throughout the flood season which may extend several months into the future. Of course, actual hydrographs are needed in order to track simulations and provide a time estimate of the volumes. Lead times, however, are measured in days or weeks, rather than hours...
Rainwater harvesting as a water supply option in rural Sri Lanka
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Rural Community in Sri Lanka comprises of nearly 70% of the population of 18.6 million. Only 57% of the rural population is served with safe drinking water. Despite several successive programs by the government there is still need to expand the water supply facilities to rural areas to meet the governments target of “safe water for all” by year 2010. Rainwater harvesting program was first initiated By Ministry of Housing and Public Utilities in 1996 through Community Water Supply...
Rainwater Utilization and Development of Sustainable Water Resources
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Rainwater harvesting is a practical and economical small-scale technology that is contributing significantly to the preservation of environment and ecology in the semi-arid and sub-humid regions. It has a widespread application both in household water supply and sustainable agriculture. The household practice is particularly suitable at locations without public water supply and in islands where surface water and underground water are unavailable or too expensive to develop. The rainfed agriculture collects rainwater at water conservation terraces and use mainly for irrigation purposes.
Approaches to Continental Scale River Flow Routing
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
A rearrch report on CONCEPTUALMODELS OF A RIVER BASIN:In developing models of hydrologic systems, it is recognized that processes that occur in nature cannot be reproduced exactly. Even if such a representation of natural processes were possible, the resulting model would be so complex that it would be impossible to solve mathematically. Some simplifying assumptions are consequently made to reduce the complex system to a set of simple descriptive processes
SELF-SIMILARITY AS A PHYSICAL BASIS FOR REGIONALIZATION OF FLOOD PROBABILITIES
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The self-similarity conjecture can provide an assessment of regionalization procedures for flood frequency analysis if the scaling properties of flood flows as parameterised by drainage area are considered. The question whether simple scaling can be used to discriminate among different flood probabilities in relatively small regions with high variability of climate and geomorphological features is investigated. Detailed simulations for a small basin in Thyrrhenian Liguria (North-West Italy) show that self-similarity or simple scaling properly represent the spatial variability of flood ..
International Conference on Snow Hydrology The Integration of Physical, Chemical, and Biological Systems
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
During the last 20 years, considerable progress has been made in our understanding of the properties of seasonal snow covers and the physical processes controlling changes to these properties. An improved understanding of these provides the basis required for a better understanding and ability to predict the complex role snow plays in northern environments. These include, for example, streamflow, climate, fluxes of nutrients through the snowpack, and subnivean ecology. An improved predictive ability also provides the ability to better alleviate a variety of environmental issues,...
Rouge River Assessment (DEPARTMENT OF NATURAL RESOURCES)
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
This report is one of a series of river assessments being prepared by Fisheries Division of the Michigan Department of Natural Resources for Michigan rivers. This document describes the hydrologic characteristics and biological communities of the Rouge River and its watershed in southeast Michigan. This assessment’s purposes are first, to identify opportunities and solve problems concerning aquatic resources and fisheries values within the watershed. Second, to provide a way for public involvement in fishery management decisions.
The Water Conflicts in the middle east from Palestin Perpective
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Effect of Spatial Scale on Hydrologic Modeling in a Headwater Catchment
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Thesis: The specific objectives of this research are: (1) To determine the effects of spatial scale on hydrologic simulation for a lumped and a continuous model. (2) To determine if model calibration based on a continuous simulation is an improvement over calibration based on several single events. (3) To investigate TOPMODEL, specifically, the routing procedure, parameter sensitivity, and the role of the topographic index.
Use of TOPMODEL for simulating catchment hydrology
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
This TOPMODEL package is intended as a teaching tool to give some insight into the advantages and difficulties of distributed hydrological model in a visual way, in terms of both presenting hydrographs and maps of the predictions of saturated area in the catchment under study based on the distribution of the topographic index. It has been simplified to reduce the number of parameters that need to be supplied or calibrated to 5.
AN URBAN FLOOD DYNAMIC SIMULATION MODEL BASED ON GEOGRAPHIC INFORMATION SYSTEM
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
This paper describes the implementation of geographic information system (GIS) technology in the Urban Flood Dynamic Simulation Model (UFDSM). The combining of the UFDSM models into one integrated system model base is also discussed. The paper also describes in detail the acquiring, storing, updating, analyzing, and displaying of the data in conjunction with UFDSM. The viability of the GIS/UFDSM linkage in a micro-computing environment is demonstrated with a case study of the Liuhuahu subdivision in Guangzhou, China.
INVENTORY OF HYDROLOGIC MODELS
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
A common challenge to hydrologists and engineers involved in hydrologic simulation is to answer the question, "which hydrologic model should be used?" In order to answer this question, one must first address the question "which hydrologic models are available?" Compiling a complete list of available hydrologic models, even in a specific category, is a difficult if not impossible task to perform in most cases.This document presents a relatively detailed inventory of well known and reputable hydrologic models used and
Kentucky Watershed Priority Formula: Application Guidelines and Data Requirements
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
This report presents a methodology for ranking and selecting individual 11-digit HUCs for subsequent development of detailed watershed management plans as part of the Kentucky Watershed Management Framework. The proposed methodology consists of two phases: 1) Prioritization and 2) Targeting. The prioritization phase is used to rank 11-digit HUCs on the basis of existing special protection areas and the existence or potential existence of designated use impairment. The prioritization is accomplished using a priority watershed formula developed especially for this purpose. The formula ...
A Water Handbook:Towards better programming
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
This Water Handbook is the second of the Technical Guidelines Series prepared by the Water, Environment and Sanitation Section, Programme Division, UNICEF. Titles of all publications in this series are printed at the end of this Handbook. Any part of this document may be freely reproduced with the appropriate acknowledgment. Spanish and French versions of this document will also be produced.Integrated water management can only be possible if the community is empowered through decentralization and is free to make decisions on their natural resource management...
WATER HARVESTING FOR AFFORESTATION IN DRY AREAS
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Water harvesting for afforestation is applied in arid and semi-arid regions where rainfall is not sufficient to sustain a good seedling / tree growth . Water harvesting can significantly increase the rate of tree establishment in drought prone areas by concentrating the rainfall/runoff . Various water harvesting techniques of Rainwater Harvesting and Floodwater Harvesting, ('Spate Irrigation') are employed worldwide for tree establishment. Rainfall amount and distribution, topographical conditions, soil type, crop species and the preferences of the cultivators determine the choice of ...
IMPROVEMENT OF WATER MANAGEMENT IN FLOOD PRONE AREAS: CASE STUDY – TANZANIA
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
In Tanzania urban population is growing faster with an average growth rate of about 6.5% per annum during the period 1990-1994 (source: World Development Indicator 1996). These population growths will not only have an impact on water supply demand for human consumption but also other water uses like irrigation, industries, etc. Everybody lives downstream. The integrity of water cycle makes downstream activities vulnerable to upstream land and water resources management. At present the Dar es Salaam city in Tanzania is being affected every now and then by the overflowing of urban river...
Water Quality Relationships and Evaluation Using a New Water Quality Index
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Water quality is dependent on a variety of measures, including dissolved oxygen, microbial contamination, turbidity, nutrients, temperature, pH, and other constituents. Determining relationships between water quality parameters can improve water quality assessment, and watershed management. In addition, these relationships can be very valuable in case of evaluating water quality in watersheds that have few water quality data.The objectives of this study are to define some useful relationships between common water quality constituents and use these relationships in evaluating water ...
On the effect of digital elevation model accuracy on hydrology and geomorphology
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
This study compares published cartometric and photogrammetric digital elevation models (DEMs) of various grid spacings with a ground truth data set, obtained by ground survey, and studies the implications of these differences on key hydrologic statistics. Inferred catchment sizes and stream networks from published DEMs were found to be significantly different than those from the ground truth in most instances. Furthermore, the width functions and cumulative area relationships determined from the published DEMs were found to fall consistently outside the 90% confidence limits...
MUTUAL CONTROL BETWEEN STRUCTURAL PROPERTIES OF (FRACTAL-LIKE) RIVER NETWORKS AND THEIR HYDROLOGIC RESPONSE
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
The study of river network morphology in view of the definition of the basin response characteristics has received new impulses since the introduction of fractal geometry concepts in geomorphology. It is now widely accepted that river networks can be often modelled as fractal objects (e.g. Mandelbrot, 1983; La Barbera and Rosso, 1989; Claps and Oliveto, 1996) and that their structure obeys some principles of least (and/or uniform) energy dissipation (e.g. Rinaldo et al., 1992; Fiorentino et al., 1993). Despite that, the concept of fractal geometry has not been extensivelyused in the ..
تعيين دوره هاي خشکسالي با استفاده از شاخص SPI
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: فارسي
کمبود بارش اثرات متفاوتي روي آبهاي زيرزميني، رطوبت خاک و جريان رودخانه ها دارد. جهت تعيين خشکسالي ابتدا بايد شاخصي را بدين منظور تعريف کنيم. شاخص SPI يک شاخص اقليمي است. اين شاخص جهت تعيين کمبود بارش در مقياسهاي زماني مختلف کاربرد دارد. مقياسهاي زماني اثرات خشکساليرا روي توانائي منابع آب نشان مي دهند. کمبود بارش در مقياس زماني کوتاه مدت بر روي رطوبت خاک اثر مي گذارد در صورتي که اين کمبودها درمقياس زماني بلند مدت بر روي آبهاي زيرزميني، دبي رودخانه ها و منابع ذخيره آب اثر مي گذارد.
چالش هاي آبخيزداري در کشورهاي در حال توسعه با تاکيد بر ايران
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: فارسي
امروزه در کشورهاي در حال توسعه از جمله ايران اصطلاحاتي نظير توسعه پايدار، توسعه روستائي، مديريت جامع آبخيز و... در مقالات و کتب به چشم مي خورد و هر يک بر اساس تئوري خود راه حلهاي .... به نظر مي رسد لازم است متخصصان و طراحان سياستهاي کلان ملي در بخش کشاورزي بطور عميقي بر مفاهيم و اصول آبخيزداري ....
ارزيابي چند متغييره پروژه هاي منابع آب از ديدگاه توسعه پايدار در ايران
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: فارسي
مفهوم توسعه پايدار در جهان ... با توجه به شرايط اقليمي خشک حاکم بر پهنه فلات ايران، استفاده پايدار از منابع آب مهمترين رکن توسعه طرحهاي مزبور قلمداد مي شود. ارزيابي زيست محيطي اقتصادي طرحهاي منابع آب با هدف توليد انرژي برقابي يا کشاورزي بطور همزمان همواره مورد توجه تصميم گيرندگان و مسئولان انجام اينگونه پروزه ها بوده است. در اين مقاله ضمن معرفي روشهاي ارزيابي چند متغييره طرحها، از روش A.P.H جهت ارزيابي دو پروژه ....
رفتار سنجي دقيق در سدها
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: فارسي
در اين گزارش با نتيجه لزوم استفاده از ابزار دقيق و تحليل اطلاعات حاصله از رفتارسنجي سدها، موارد زير مورد بررسي قرار گرفته اند: ارزيابي پارامترهاي مورد نظر براي رفتارسنجي سدهاي خاکي و بتوني به تفکيک و فضاي زيرزميني مربوطه- بررسي پارامترهاي موثر در انتخاب مناسب ترين نوع و مشخصات فني ابزار دقيق- طراحي شبکه ابزار دقيق، برنامه زمان بندي قرائت ابزار دقيق- پردازش داده ها، رسم منحني هاي رفتار سنجي و تفسير اطلاعات حاصله -تعيين قريب به يقين ترين پارامترهاي ژئومکانيکي سدها و توده سنگ در بر گيرنده ، با استفاده از آناليز برگشتي داده هاي ابزار دقيق ...
Development of Rainwater Utilization Technology in Taiwan
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Rainwater utilization technology has developed over the last 10 years. Before the 90s, it is mostly used for irrigation in agriculture such as the familiar use of farm ponds and terrace storage in the northwestern mudstone and western marginal mountainous regions. The related rainwater utilization technologies include water supply ditch plan, farm pond sediment discharge design and rainfed irrigation systems. In the mid 90s, the rainwater utilization technology, influenced by the advancement and development in foreign countries, has been gradually diversified to provide multi-purp...
REAL-TIME PREDICTION FOR FLOOD WARNING AND MANAGEMENT
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Within the context of predicting and mitigating flood hazards, this paper motivates the development of innovative ideas in three engineering research areas: (a) spatially-distributed quantitative rainfall prediction, (b) spatially-distributed flow prediction, and (c) long-term flow prediction for water resources management. Design, operational implementation, real-time testing, and training of field personnel should be the cornerstone of such development for realizing the potential benefits in these fields.
THE 1994 FLOOD OF THE GIOFYROS BASIN ON THE CRETE ISLAND: A CASE STUDY OF RISK-BASED FLOODPLAIN MANAGEMENT
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Engineering Risk Analysis and Multi-Objective Decision-Making Under Risk are considered as a general framework for floodplain management and protection from extreme floods. Distinction is made between (a) the catchment or large scale planning and (b) the local or small scale design of protective measures. After defining the risk of flooding at different scales and multiple criteria for selecting among alternative measures of floodplain protection and .
Flood Protection: A Common Goal for Federal, Cantonal and Municipal Authorities
تاريخ ثبت در سايت ايران هيدرولوژي 20-1-1383
نام و نام خانوادگي ثبت کننده: مدير سايت
زبان مقاله: انگليسي
Such basic ideas and the increase in environmental consciousness prompted the Federal Office for Water and Geology (FOWG) to review the legal and technical background conditions. The collaboration on all administrative levels and between the various agencies concerned is imperative for a successful flood protection.
© کپی رایت توسط ایران سازه، وبسایت تخصصی مهندسی عمران (کلیه حقوق مادی و معنوی مربوط و متعلق به این سایت است.)
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