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GRUPPO SPELEOLOGICO BOLOGNESE (G.S.B.)Fondato nel 1932 da Luigi Fantini

UNIONE SPELEOLOGICA BOLOGNESE (U.S.B.)Fondata nel 1957

Aderenti alla Società Speleologica Italiana Membri della Federazione Speleologica Regionale dell’Emilia Romagna.Scuola di Speleologia di Bologna della Commissione Nazionale Scuole di Speleo-logia della S.S.I.

SOTTOTERRARivista semestrale di speleologia del Gruppo Speleologico Bolognese e dell’Unione Speleologica Bolognese.

DIRETTORE RESPONSABILE:Carlo D’Arpe

REDAZIONE:D. Demaria, A. GentiliniP. Grimandi, F. Orsoni,

SEGRETERIA E AMMINISTRAZIONE:Unione Speleologica Bolognese – Cassero di Porta Lame P.zza VII Novembre 1944, n. 7 – 40122 Bologna – tel. e fax 051 521133.Autorizzazione del Tribunale di Bolognan. 3085 del 27 Febbraio 1964.Codice Fiscale 92005210373.

Inviato gratuitamente ai Gruppo Speleologici aderentialla Società Speleologica Italiana.e-mail: info@gsb-usb.it http: www.gsb-usb.it

REALIZZAZIONE GRAFICA: Grafiche A&B BolognaTel. 051 471666 – Fax 051 475718 E-mail: graficheaebsnc@virgilio.it

Per scambio pubblicazioni indirizzare a:

BIBLIOTECA “L. FANTINI”del G.S.B.-U.S.B.Cassero di Porta LameP.zza VII Novembre 1944, n. 740122 Bologna

Gli articoli e le note impegnano, per con-tenuto e forma, unicamente gli autori. Non è consentita la riproduzione di noti-zie, articoli, foto o rilievi, o di parte di essi, senza preventiva autorizzazione della Segreteria e senza citarne la fonte.

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Rivista di Speleologia delGRUPPO SPELEOLOGICO BOLOGNESE e dell’UNIONE SPELEOLOGICA BOLOGNESEAnno XLIX n° 130Gennaio - Giugno 2010

Abstact, a cura di Francesca Torchi ..............................................pag. 2Attività di Campagna, a cura di Federica Orsoni .................... pag. 4Assemblea Generale GSB-USB, a cura di F. Marani ..............pag. 10GSB-USB: gli incaricati nel 2010 ed Elenco Soci ...............pag. 12GLI ANTICHI ACQUEDOTTI IPOGEI DI BOLOGNA

ipogei di Bologna di Flavio Gaudiello ..............................pag. 18

sintesi di una ricerca di Danilo Demaria ........................pag. 21

di Nicoletta Lembo ..................pag. 24

di Bologna di Nevio Preti .......................................................pag. 31di Rolando Giampi ......................pag. 35

Spedizione Speleologica in Bosnia: 29.05/12.06.2010. Diario di Campodi Nevio Preti, Michele Castrovilli, Giuliano Rodolfi e Roberto Calzolari .............................................pag. 39Via col Vento di Y.Tomba, F. Gaudiello, P. Gualandi ..................pag. 50

di Roberto Calzolari ............................................................................pag. 55La Grotta Lulù di Mauro Danesi ...................................................pag. 57I risultati del monitoraggio ambientale nella Grottadel Farneto di P. Forti, C. Dalmonte, E. Casagrande, N. Lembo, T. Mondini ...............................................pag. 60Immersione al Prete Santo di Gilberto Bonaga .....................pag. 75Ingressi e disostruzioni nei Gessi di P.Grimandi ..................pag. 78La ricerca di Mariano Cologna di Aurelio Pavanello ............pag. 85

di P. Dilamargo .................pag. 86aparte)

di Giuseppe Rivalta e Carla Ferraresi ..............................................pag. 89Un anno nel Gruppo di Michele Castrovilli e Massimo Dondi .........................................pag. 93Speleologia e……Fisici di Tommaso Chiarusi ........................pag. 96Il 29° Corso di II Livello, a Ferrara e il 30° Corso di II Livello, a Zattaglia di Stefano Cattabriga ........................pag. 97 Il 48° Corso di III Livello, a Pertosa di G. Rivalta ....................pag.102Il Cassero ed il GSB-USB verso il pubblicodi Nevio Preti e Francesca Torchi .................................................... pag. 103

2

abst

ract The ancient aqueducts of Bologna:

new discoveries and new studies.

The study of Bologna’s ancient aqueducts recently carried out by the Speleologists of GSB-USB required five years of research. Focus has been put on the most impor-tant of these, the Roman Aqueduct of Augustan times that for 2000 years has been watering the city but, partly for this very reason, has never before been the object of a map survey able to highlight the complexity and the beauty of this wondrous huge hydraulic work of ancient times.After the first layout had been completed, many other interventions followed over the centuries, setting up new branches and abandoning stretches belonging to the original route.During restructuring carried out at the end of the 19th century which reopened the aqueduct, the shortest route was chosen. It followed some trunks from Augustan times, alternating with others of a later period. Thus the aqueduct now in use is just a part of a wider complex of underground tunnels and represents its latest historical evolution.Therefore it was necessary to achieve the goal of recovering the other sections chronologically abandoned in order to get as complete an overall view of the whole underground aqueduct system of Bologna as possible.In order to provide the city with spring water, during the 15th and 16th centuries other underground works were built, such as the Fonte Remonda and the Conserva di Valverde, that were grafted onto the last part of the Roman underground tunnel, near the city. These structures, in use for several centuries, were discontinued when the Roman aqueduct resumed its regular work in 1881. Those late Medieval and Renaissance works had to be investigated too, especially to understand their rela-tion with the Roman underground tunnel.Extraordinarily interesting news emerged from this campaign. First of all it was possible to investigate the section of the Galleria Trasversale in Val di Setta (no longer in use), where it was possible to document for the first time the highest upstream stretch of Roman underground tunnel attainable until now.Then, in nearby Albano, in Sasso Marconi, another part of the aqueduct was explored, documented and studied. Here renovation works dating from the late 19th century led to the discovery and reactivation of a new branch used to operate the Albano Mill.This underground channel had been forgotten when the Mill stopped working in the 1950s. The research allowed it to be rediscovered and studied along 1.300 metres. From a historic point of view, this section is an integral part of the original Augustan layout, whereas the one in use today is a variation produced during one of the renovations dating from Roman times.It is worth specifying some data that quantify the results obtained and the com-mitment needed to attain them. The campaign activity required 185 working days from 80 Speleologists of the Group for a total of 2100 hours. The develop-ment of the Roman aqueduct now in use, with its abandoned parts and other accessory hypogea (pits, manways and access galleries), runs a total of 22.56

a cura di Francesca Torchi

abst

ract

3

kilometres, whereas the late Medieval and Renaissance hydraulic works have a development of 23.6 kilometres.Regarding documentation, 3.500 photos were taken and several hours of video-recording were made. The results of the field studies, including a wide examina-tion of printed and handwritten sources kept in the Archiginnasio Library and the State Archive, are accurately explained in a special full-colour issue of 320 pages, published by GSB-USB in June 2010.A touring exhibition was also mounted. It sums up the contents of the research and is made up of 37 roll-ups and a 9-metre long model, reproducing in full-scale 1/1 the three different typologies of the Roman manufacture, built in relation to the kind of terrains crossed by the work: sandstone, cement pozzolanic conglom-erate and plastered bricks.

le nuove scoperte, i nuovi studi

Il volume (29,5x22,7, 320 pagg.), edito dal GSB-USB nel giugno 2010

a pag. 17