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Operational hydrology report (OHR), 50. Manual on Low-flow Estimation and Prediction
The Manual's objective is to publish state-of-the-art analytical procedures for estimating and predicting low river flows at all sites, regardless of the availability of observational data. The Manual wil be useful for many applications, including water resources planning, effluent dilution estimates and water resources management during low-flow conditions.
Operational hydrology report (OHR), 49. Guidelines on the role, operation and management of National Hydrological Services
Providing guidance to the senior managers of Hydrological Services, on the key issues they might face, as they lead, manage and administer their services. All aspects of management are reviewed: strategic planning, human resources management, financial management, marketing, asset management, process and quality management, relationships with other institutions. This publication is especially important at a time when NHSs worldwide are typically having their mandate expanded from basic hydrology to hydrology in the broader context of sustainable water resources management.
Operational hydrology report (OHR), 47. Manual on sediment management and measurement
This report covers a wide range of issues related to sedimentation. Its objectives are to present to readers a basic understanding of operational methods of sediment transport measurement, and serve as a practical reference in dealing with sedimentation engineering.
Operational hydrology report (OHR), 42. Meteorological systems for hydrological purposes
This report consists of seven chapters covering a wide range of issues on the relationship between meteorological systems and their applications for hydrological purposes. The objective of this report is to present the need for meteorological systems for hydrological purposes.
Operational hydrology report (OHR), 48. Hydrological Data Management: present state and trends
This report details the present state and trends in constructing data-bases for hydrological data, the real-time utilization of the data and the application of Geographical Information Systems (GIS) to operational hydrology in various countries.
Operational hydrology report (OHR), 46. Precipitation estimation and forecasting
This publication discusses a wide range of techniques which have been developed worldwide for measuring and forecasting precipitation. These range from point gauge measurements to methods based upon interpretation of indirect data obtained from space-based instrumentation.
Operational hydrology report (OHR), 43. Current operational applications of remote sensing in hydrology
This publication discusses technical and economic aspects of applications of remote sensing in hydrology.
Operational hydrology report (OHR), 45. Contaminants in rivers and streams: prediction of travel time and longitudinal dispersion
This publication discusses the theory of movement and dispersion of dissolved pollutants and introduces the unit-peak concentration concept. A summary of the methods used to collect time-of-travel information is given, along with a summary of the data used in the report. Methods are recommended for estimating the rate of movement and attenuation of conservative pollutants based on an analysis of the data.
Operational hydrology report (OHR), 44. Aeral modelling in hydrology using remote sensing data and geographical information system
This publication discusses directions taken with regard to hydrological modelling, capitalizing on the higher resolutions in time and space of data from automated surface sensors, remote sensing and geographical information systems.
Operational hydrology report (OHR), 41. An overview of selected techniques for analysing surface-water data networks
This report brings together under one cover a review of a number of techniques currently employed in evaluating and designing stream gauging networks and illustrates their use with examples.
Operational hydrology report (OHR), 40. Land surface processes in large-scale hydrology
This report addresses the major interactions between climate and land surface processes on a large scale. Particular emphasis is given to surface hydrology and the role of vegetation in the context of global change (i.e. changes in the physical, chemical and biological processes of the Earth's surface and atmosphere).
Operational hydrology report (OHR), 39. Applications of remote sensing by satellite, radar and other methods to hydrology
This report provides information on the advances in applications of remote sensing to hydrology and water resources management.
Operational hydrology report (OHR), 38. Simulated real-time intercomparison of hydrological models
This report presents essential elements of the history, design, implementation and results of the WMO project on the simulated real-time intercomparison of hydrological models. The aims of the project included a study to compare the abilities of both rainfall-runoff and snowmelt-runoff models to forecast stream flow under simulated real-time conditions and to report on case studies, thus offering guidance through demonstrations of the models' abilities in various situations. Fourteen models were used in the intercomparison which took place during a workshop held in Vancouver, Canada, in 1987.< ...
Operational hydrology report (OHR), 37. Hydrological aspects of accidental pollution of water bodies
This publication contains guidance material on methods, techniques and procedures for use in monitoring, forecasting and warning of the accidental pollution of water bodies. The material incorporates nine case studies, including a description of the radioactive contamination of water bodies following the Chernobyl nuclear accident.
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