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Abstract:	Der Beitrag thematisiert das BMBF-geförderte Projekt “KaWaTech”, welches auf die Entwicklung und Umsetzung innovativer Wasserförder- und -verteilkonzepte für sub-/tropische (Karst-)Regionen abzielt. Unter anderem wird in der Provinz Ha Giang eine Pilotwasserförderanlage realisiert, welche die Versorgung von ca. 10 000 Menschen sicherstellen soll. Als Bypasslösung für Wasserkraftanlagen dient sie der Nutzbarmachung der für den Turbinenbetrieb nicht effizient verwertbaren Restwassermengen während der Trockenzeit über ein wasserkraftbetriebenes Pumpsystem. Neben der Implementierung der Maschinentechnik wurden umfassende Sanierungsmaßnahmen an der wasserbaulichen Infrastruktur umgesetzt. In diesem Zusammenhang wurden auch baustofftechnologische Untersuchungen zu optimierten Betonrezepturen auf Basis lokaler Ausgangsstoffe durchgeführt. Das geförderte Wasser wird in einen zentralen Hochbehälter eingespeist und den umliegenden Siedlungen und der Distrikthauptstadt gravitär zur Verfügung gestellt. Um eine gerechte Verteilung zu ermöglichen, wurde ein flexibles Verteilungskonzept zur Berücksichtigung dynamischer Dargebotsschwankungen entwickelt. Zudem wurde die Angliederung des neuen Verteilsystems an das bestehende Leitungsnetz der Distrikthauptstadt mittels eines adaptiven Druckmanagements entworfen. Innovative technologies for water supply and distribution in mountainous regions This report addresses the BMBF-funded joint-project “Karst Water Technologies (KaWaTech)”, which concentrates on the development and implementation of innovative water pumping and distribution concepts for subtropical and tropical (karst) regions. Among others, a pilot pumping system is realized in the province Ha Giang, Northern Vietnam, which shall secure the water supply of several thousand people in a sustainable way. As a bypass solution for hydropower plants this facility aims to utilize residual flows during the dry season through a hydropower-driven pumping system, which cannot be used efficiently for the operation of water turbines. Beside the implementation of the machinery, comprehensive reconstruction and optimization measures have been carried out at the hydraulic infrastructure. In this context comprising investigations regarding adapted building materials have been accomplished in order to develop optimized concrete recipes based on locally available materials. The supplied water is fed into a centralized reservoir from where it is distributed to the surrounding settlements as well as to the district capital by gravity. In order to accomplish a fair water distribution a flexible distribution concept was developed which considers dynamic fluctuations of the water yield. Here, a new type of distribution tank, containing an innovative multi-chamber-system, enables a yield-depending but demand-oriented water supply. Furthermore, the connection of the new distribution system to the existing pipe network of the district's capital was designed. The deficient condition, which among others results from the intermittent operation, required this measure in order to avoid further damages of the infrastructure as well as to ensure the supply with sufficient network pressure.
Source:	Bautechnik 94 (2017), No. 8
Page/s:	514-525
Language of Publication:	German

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