Watercourse Maintenance: A Look At The Plants
And Hydrology Of A Case Study On The
Tiber River
Author(s)
M. Bellezza, L. Nasini, S. Casadei & A. Standardi
Abstract
In order to prevent damage caused by extreme hydrological events in a river
basin, it is of the utmost importance that the surrounding territory and
watercourses of the river are kept clear and well maintained. Although this is
universally recognised as a valid concept which should be put into operation,
numerous practical problems arise, mainly linked to areas to be found along
many of these rivers, such as river parks and sites of community interest, which
are often protected. This situation gives rise to a complex debate, in which river
ecology is often in direct contrast with hydrology. For this reason a study was
developed in conjunction with the Province of Perugia aimed at taking a detailed,
integrated look at both watercourse plants and hydrology simultaneously. The
results obtained on the reaches of the Tiber River examined have shown how
plant data (the fruit of three years of monitoring existing vegetation) enable us to
provide an extremely detailed picture of the state and nature of the riverine
vegetation, so that ways to cut and thin it out can be proposed according to the
botanical and agronomic knowledge of these species. The hydrological effects of
this approach were simulated using HEC-RAS calculation procedures in order to
outline the effects in flood conditions. Special attention was paid to the possible
phenomenon of the partial obstruction of the stream connected with the bridges
and their dimension, and with the amount of vegetation which can be expected to
be uprooted by virtue of its state of conservation and its position on the river
banks. These results are also useful for identifying an operational protocol,
which can be helpful in contracting such maintenance work along rivers with
similar characteristics to the one being studied.
Keywords: riverine vegetation, plant management, roughness coefficient, flood
condition, floating vegetation.
Keywords
riverine vegetation, plant management, roughness coefficient, flood
condition, floating vegetation.
Related Book
Other papers in this volume
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