Fig. 2From: Are river protected areas sufficient for fish conservation? Implications from large-scale hydroacoustic surveys in the middle reach of the Yangtze RiverProfiles of water levels in the 906.7 rkm river reach downstream of the Gezhouba Dam, Yangtze River, 2010–2017, surveyed by the YHMS (Yichang Hydrological Monitoring Station). The vertical dotted line represents the date of the hydroacoustic survey; Roman numerals represent the survey IDs (Fig. 1; Table 3)Back to article page