我们需要在水位下降时采取措施。
当水位下降，趸船则可以向江中移动，尽最大努力保证取水。[{'character': '当', 'pinyin': 'dang1', 'highest pitch': 10.6, 'lowest pitch': 9.56, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '水', 'pinyin': 'shuei3', 'highest pitch': 10.6, 'lowest pitch': 5.38, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '位', 'pinyin': 'uei4', 'highest pitch': 8.55, 'lowest pitch': 5.67, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '下', 'pinyin': 'xia4', 'highest pitch': 9.88, 'lowest pitch': 8.42, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '降', 'pinyin': 'jiang4', 'highest pitch': 10.49, 'lowest pitch': 6.99, 'duration': 0.27, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.33}, {'character': '趸', 'pinyin': 'duen3', 'highest pitch': 7.87, 'lowest pitch': 6.01, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '船', 'pinyin': 'chuan2', 'highest pitch': 9.15, 'lowest pitch': 6.01, 'duration': 0.38, 'prosody hierarchy': '#2'}, {'character': '则', 'pinyin': 'ze2', 'highest pitch': 8.45, 'lowest pitch': 6.82, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '可', 'pinyin': 'ke2', 'highest pitch': 8.4, 'lowest pitch': 6.82, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '以', 'pinyin': 'i3', 'highest pitch': 6.95, 'lowest pitch': 5.62, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '向', 'pinyin': 'xiang4', 'highest pitch': 7.65, 'lowest pitch': 5.94, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '江', 'pinyin': 'jiang1', 'highest pitch': 8.99, 'lowest pitch': 6.57, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 9.82, 'lowest pitch': 8.76, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '移', 'pinyin': 'i2', 'highest pitch': 9.64, 'lowest pitch': 5.65, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '动', 'pinyin': 'dong4', 'highest pitch': 8.05, 'lowest pitch': 5.7, 'duration': 0.25, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.29}, {'character': '尽', 'pinyin': 'jin4', 'highest pitch': 10.21, 'lowest pitch': 9.22, 'duration': 0.24, 'prosody hierarchy': '#1'}, {'character': '最', 'pinyin': 'zuei4', 'highest pitch': 10.83, 'lowest pitch': 9.22, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '大', 'pinyin': 'da4', 'highest pitch': 10.41, 'lowest pitch': 7.49, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '努', 'pinyin': 'nu3', 'highest pitch': 7.49, 'lowest pitch': 5.38, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '力', 'pinyin': 'li4', 'highest pitch': 7.02, 'lowest pitch': 5.38, 'duration': 0.2, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.09}, {'character': '保', 'pinyin': 'bao3', 'highest pitch': 5.87, 'lowest pitch': 5.38, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '证', 'pinyin': 'zheng4', 'highest pitch': 7.29, 'lowest pitch': 5.53, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '取', 'pinyin': 'qv2', 'highest pitch': 7.79, 'lowest pitch': 6.4, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '水', 'pinyin': 'shuei3', 'highest pitch': 10.6, 'lowest pitch': 3.77, 'duration': 0.36, 'prosody hierarchy': '#4'}]