1,720,963 research outputs found
Dynamic response of large-diameter pipelines in seismic areas: particular cases
No full textBologna (Italia
Impianto per lo studio del trascinamento di aria in presenza di oscillazioni di massa. Prime prove sperimentali
No full text
Dynamic response of large-diameter pipelines in seismic areas: particular cases
No full textBologna (Italia
The effects of river netwok works and soil conservation measures on reservoir silting-up
No full textKnowledge of the morphological dynamics of a water course is essential for management of reservoir siltation. With an example of sedimentation in a reservoir in Basilicata, Italy, this paper demonstrates the effect on reservoir siltation of the hydraulic works, which are aimed to reduce sediment transport along the fluvial network and to prevent part of the sediment discharge from reaching the lake. The effect depends on the river type and on the the geological features of river basin slopes. The paper also shows how mass erosion can significantly contribute to development of reservoir siltation. Finally, preliminary results are provided about the time needed for river training works to be effective
Modello del trascinamento d’aria in un pozzo di caduta in Regione I e controllo sperimentale
No full textAir entrainment in a dropshaft working in transition between the so-called Region I and Region II.
No full textProceedings on CD-ROM. Paper of 10 pages
An ecological approach for estimating turbidity in a river
No full textIn purging and disposal of sediments operations of a reservoir it is necessary to know the values of turbidity in the river downstream in natural conditions. The paper shows that under these conditions, in the absence of dams or river training works, the ratio of the average values of sediment discharge to the annual maximum value of water discharge is a function of the average annual turbidity. Turbidity can be regarded as representative synthetic index of the climatic conditions, the lithological features and the land cover of the basin, and the geometric characteristics of the river network. The proposed relationship of sediment discharge as a function of water discharge were validated on the basis of data from in different regions of Italy, with very different morphological, geo-lithological and rainfall characteristics, and with basin area changing between a few dozen and thousands of square kilometres. The results can be considered satisfying
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