首页|Ice Characters in Ningxia-Inner Mongolia Reach of Yellow River in Recent Decade
Ice Characters in Ningxia-Inner Mongolia Reach of Yellow River in Recent Decade
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NETL
Yellow River is the second longest river in North China and the most sediment river over the world。 Affected by special geographical position and water sediment condition， the Ningxia-Inner Mongolia Reach of Yellow River is the key reach of ice flood protection for its serious ice regime。 Based on the observed data over recent decades， characters of ice regime in Ningxia-Inner Mongolia Reach of Yellow River are analyzed。 In recent 10 years， the date of river ice run， freeze-up and break-up have obviously changed; the under-ice flow capacities of channel distinctly reduced， inversely the channel-storage increment gradually increased; water levels are constantly elevated during freeze-up and break-up period， dike protection is facing great pressure; Ice prevention situation are becoming serious。 The changes of ice character are the results of comprehensive effects of climate change， reservoir operation， channel sedimentation and human activities。 Some work should be done to improve the ability of ice flood protection。 Firstly， prototype observation of ice regime need be strengthened by increasing more observation cross-sections and observed frequency; further more， some large scale ice jam or ice bars should be given tracing observation to obtain the whole ice evolving information; on the second， more attention should be paid on the researches of ice freeze-melt rules， including the influence of channel condition， runoff， temperature and artificial constructs effects on ice freezeup， hydraulic resistance of ice covered river channel and ice flood routing rule; The third， ice-water dynamic model is the direction of ice forecast development， there are some experiences in ice model development can be used both at home and abroad。
Ice characterchanel-storage incrementice forecastNingxia-Inner Mongolia Reach of Yellow River
Jifeng LIU、Suqiu RAO、Hongxia WU、Dongling CHEN、Tequn YANG
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Hydrology Bureau of Yellow River Conservancy Commission, Yellow River Conservancy Commission, YRCC, Zhengzhou, 450004, China
Conference on Water in Cold Region;CWCR 2011
Fuyuan(CN);Fuyuan(CN)
Ice Regimes in Cold Regions and Hydrological Effects of Frozen Soil.
NETL
