Table 2 Rank Order Verification Results for Annual Water Runoff and Annual Sediment Transport at Different Hydrometric Stations Hydrometric station Critical value Water runoff Sediment transport Silt concentration Water runoff Sediment transport00 Sediment transport Pinshan 0.283 0.059 0.213 0.289 Not apparent Comparatively apparent Apparent Gaochang 0.283 0.255 0.291 -0.270 Comparatively apparent Apparent Comparatively apparent Beipei 0.283 0.369 -0.660 -0.730 Apparent Apparent Apparent Cuntan 0.280 0.159 0.415 -0.440 Not apparent Apparent Apparent Wulong 0.286 0.200 -0.294 -0.467 Not apparent Apparent Apparent Yichang 0.272 0.377 0.674 -0.716 Apparent Apparent Apparent