The Water Turbine needs a minimum head of 10m (1bar).Just connect a hose with inner Diameter of approximately 15mm to it.
You need the following parts:
3d-printed parts Generator: http://www.ebay.de/itm/Fahrradbeleuchtung-Fahrradlicht-Dynamo-Set-R%C3%BCcklicht-Vorderlicht-Lampe-NEU-SET/252726855388?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649