Experimental Study on the Influence of Barrier Structures on Water Renewal Capacity in Slow-Flow Water Bodies

Artificial islands and viewing pavilions can act as barriers in slow-flow water bodies such lakes be used together with diversion projects to improve the quality. In this study, based on particle image velocimetry system, we carried out flume experiments study influence of location shape purification capacity a body. We analyzed velocity composition information entropy H vector distributions, average exchange rate η. The results reveal that hydrodynamic characteristics are significantly optimized by barrier structures. η doubles if structure is reasonably designed, it positively correlated velocity. all cases, highest recorded for shaped rectangular column increases interaction area between flow structure. gradually increase increasing rate. relative distance l inlet non-monotonic. To achieve higher η, column, triangular prism, semi-cylinder should 0.2–0.3, 0.3–0.55, respectively. deflection angles ratio lateral streamwise mainstream decrease l. than other shapes. guiding significance layout structures optimization landscapes practical applications.