http___ljuta.vodic.hr_museum_detail_1_1341_1_index.html_1.xml
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MAXIMUM USABILITY OF WATER POTENTIAL Originally the mills were made so that water ran from the river through sluices and a mill, falling back into the river. The next mill on the river would then take the water on its own and the procedure was repeated. As a result, a considerable amount of water energy remained unused, as the difference in river level was not being optimally used. Having noticed this problem, the authorities of Dubrovnik, after nearly four centuries, built a new system which powered the mills by water cascading before returning to the river. They even obtained nine levels for water to cascade before reaching the mills, although no more than eight levels were used in practice. A good example of the maximum usability of this system is Magud’s Mill. This mill could not be used for grinding at the time of great floods of the Konavle Field due to its low elevation, being a meter or two below the level of the river. The problem was solved by building a wall and digging a canal of over one hundred meters in length in order to align the stream with the river level. There was even a saying: "The Magud's Mill sunk". Three mills were not incorporeted into the new system. That is why in dry summer seasons only one could work given the lack of water to operate them all. That one, catching water from the river, was the last one in line and did not affect the work of other mills.
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ISKORISTIVOST VODENOG POTENCIJALA Prvi mlinovi su rađeni tako da se voda dovodi jažom iz rijeke, i nakon što prođe kroz mlin, vraća u rijeku. Sljedeći mlin ponovno zahvaća vodu iz rijeke i postupak se ponavlja. Na taj način znatan dio energije vode ostaje neiskorišten jer se visinska razlika toka rijeke ne koristi optimalno. Dubrovačke vlasti uočavaju problem, i nakon gotovo četiri stoljeća grade novi sustav koji kaskadno dovodi vodu za pokretanje mlinova prije nego se vrati u rijeku. Na Ljutoj su postigli čak devet razina (kaskada) za gradnju mlinova iako ih u praksi nikad nije bilo više od osam. O maksimalnoj iskoristivosti ovog sustava govori i podatak kako je voda iz Magudova mlina izlazila metar do dva ispod razine rijeke. Problem koji je riješen gradnjom zida i prokapanjem kanala dužine preko stotinu metara kako bi se tok poravnao s razinom rijeke. Ovaj mlin zbog niske nadmorske razine nije mogao mljeti u vrijeme velikih poplava Konavoskog polja. Tako je u vrijeme poplava postojala i uzrečica: „Zacrepali su Magudovi mlinovi“. Tri mlina nisu bila u novom sustavu. Zato ljeti, u sušnom razdoblju, dva od njih nisu smjela raditi jer nije bilo dovoljno vode za rad svih mlinova. Treći koji je hvatao vodu iz rijeke bio je zadnji u nizu i nije utjecao na rad ostalih mlinova.