Irrigation – rediscovered heritage, its documentation, popularisation and protection based on the example of historical meadow irrigation systems
Irrigation systems were built and have operated mostly as part of a larger or
smaller functional complexes. Their significance, also from the point of view
from potential heritage protection, thus increases with the identification and
documentation not only of solitary structures but, in particular, of entire systems / functional complexes with descriptions of interrelationships between them. Independent objects or structures do not need to be particularly exceptional, although their involvement in the wider functional complex can create a uniquely undertaken solution. In the field of water management, criteria such as typological value, value of technological flow, authenticity of form and function, value of technological and systemic links with an overlap to agriculture and industry are especially important. This article provides information on possibilities of using traditional methods of historical and archive research and documentation of localities, and at the same time using modern tools for systems over a more extensive area, including methods of digitisation and processing of documentation.
The alternative detemination of R-factor (Rainfall erosivity factor) in the Husí Creek catchment
Hodnocení erozní účinnosti deště je v současnosti těžištěm výzkumu v oblasti stanovení erozního ohrožení půdy. V rámci empirického modelování pomocí modelů rodiny USLE (the Universal Soil Loss Equation) je erozní účinnost deště reprezentována tzv. R faktorem, jehož hodnotu lze stanovit řadou doporučených postupů. Tento článek představuje možné alternativní způsoby určení hodnoty R faktoru na základě ročních a měsíčních sum srážkových úhrnů.
Bottom level estimation of water management infrastructures from historic project documentations
Monitoring and maintenance of water management infrastructure require knowledge of their reference state characterizing their design parameters. The reference state is derived primarily from the available project documentation, which is appropriately chosen to be converted to a digital model of the bottom terrain.
Possibilities of extrapolation of digital terrain model raster DMR 5G
Airborne laser imaging (LiDAR) has been carried out throughout the Czech Republic, enabling the creation of raster of digital model of terrain. This material is widely used in various fields. From the point of view of hydrology demands, however, the shortcoming of this technology resides in the absence of accurate/complete channel topography due to the absorption of the near-infrared laser beams by water.
The accuracy of flood extent simulation by an alternative tool – AIZM
The estimation of the extent of inundations is enabled by methods of physical and mathematical modelling which have been developing for many years. Increasing accuracy, related to precise measurements, demands higher computing capacity and more time.