History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c32.s2.t3.18

v1.c32.s2.t3.18

"The sluice-pit" (*kumiḷi*) was another system (Fig.2) for the regulation of the flow of water from the reservoir, used at required centres. In this case, the sluice-mouth was a pit, also enclosed and with a circular opening on the surface. The rod lowered through the cross-slabs in the system must have been connected to a global stone or wood that acted as the shutter. Here the difference was in the nature of the valve of the sluice. In the case of the *tūmbu*, water from the reservoir flowed into the sluice from the side and, in that of the *kumiḷi*, from above" (Rajan, 1986, pp. 160-161).