TY - JOUR ID - 75985 TI - Flow Measurement Flume with Cylindrical and Conical Walls JO - Iranian Journal of Soil and Water Research JA - IJSWR LA - en SN - 2008-479X AU - Mohammadi, Milad AU - Vatankhah, Alireza AD - Former MSc Students of Water Structures, Department of Irrigation and Reclamation Engineering, Faculty of Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, Karaj, 3 AD - Associate Professor, Department of Irrigation and Reclamation Engineering, University College of Agriculture and Natural Resources, University of Tehran, P. O. Box 4111, Karaj, 31587-77871, Iran Y1 - 2020 PY - 2020 VL - 51 IS - 7 SP - 1637 EP - 1651 KW - Stage–discharge relationship KW - Rectangular and trapezoidal constriction KW - Backwater effects KW - Flow Measurement DO - 10.22059/ijswr.2020.299677.668550 N2 - Accurate water measurement is one of the key factors for reduction of agricultural water consumption, distribution integrity and delivery management in irrigation networks. In recent years, there has been a significant advance in flow measurement devices, but the usage of these devices is limited due to the high cost, special maintenance conditions and the need for skill expertise. Water structure used in this study is a new form of flow measurement flume that installed along the channel and has cylindrical and conical shape walls. The crest matches the channel's floor thus in this measuring structure, the control section happens only by transversal constriction. The new flumes are simple in shape and easily applicable in irrigation networks and they have not sedimentation problem. The amount of energy loss and consequently the upstream backwater in this structure is low. This structure controls the flow by creating critical flow in constriction section and will be able to measure flow discharge. In this study, the flow characteristics through the cylindrical and conical flumes have been studied theoretically and experimentally, and several equations have been developed for flow discharge estimation in rectangular open channels. UR - https://ijswr.ut.ac.ir/article_75985.html L1 - https://ijswr.ut.ac.ir/article_75985_696540fba5a1ac4d09f1e5406d955e53.pdf ER -