摘要
俄罗斯萨哈(雅库特)共和国属于典型高纬度寒区,是世界地下水溢流积冰问题最严重的地区之一,布鲁斯位于萨哈共和国汉加拉斯基区东部,是地下水溢流积冰现象的代表性区域。在实地勘测的基础上,采用Geo-stu dio软件结合气象数据对不同时期山谷边坡的温度场、渗流场的分布特征进行耦合模拟并分析其对地下水溢流积冰发育的影响。结果表明:(1)研究区长达192 d稳定的负温环境,使得边坡内部过水通道温度环境维持地下水接近冻结-未冻结的临界状态,有效地提高了其溢流到地表(或积冰体表面)后的冻结效率。坡体外部最低可达-43℃的超低温度,也为其冻结提供了足够的冷量。(2)寒武纪碳酸盐岩的强风化带是坡体内为溢流积冰供水的主要过水通道,其地下水渗流速度最高可达1.23 m/d,较其他岩层水流速率(一般不超过0.05 m/d)明显加快。(3)同时充足的地下水补给为地下水溢流积冰的形成提供物质条件,形成较高的地下水水位为地下水渗流提供驱动力。本研究可为中国及其他国家和地区的地下水溢流积冰相关研究提供科学参考。
The Yakutia Republic of Russia is a typical high latitude cold region,which is one of the regions with the most serious problem of groundwater overflow icing accumulation in the world.Buluus is located in the eastern part of the Hangaraski Region of the Yakutia Republic and is a representative region of overflow icing accumulation.On the basis of field survey,Geo-studio combined with meteorological data was used to conduct coupling simulation on the distribution characteristics of temperature field and seepage field in slopes at different periods and analyze their influence on the development of groundwater overflow icing accumulation.The results show that the stable negative temperature environment of 192d in the study area makes the temperature environment of the water passage inside the slope maintain the groundwater close to the critical state of frozen-unfrozen,and effectively improves the freezing efficiency after overflowing to the ground surface(or ice surface).The lowest temperature outside the slope reaches up to 43 de grees below zero,which provides enough cooling capacity for its freezing.The strongly weathered belts of the Cambrian carbonate rock are the main water passage of the water supply of overflow icing accumulation within the slope.Its maximum seepage velocity of groundwater is up to 1.23m/d,which is significantly faster than that of other rock strata(generally no more than 0.05m/d).Sufficient groundwater supply provides material conditions for the formation of groundwater overflow icing accumulation,and the formation of a higher groundwater level provides driving force for groundwater seepage.This study can provide scientific reference for related research on groundwater overflow icing in China and other countries and regions.
作者
戴长雷
于淼
张晓红
Nadezhda Pavlova
尉意茹
DAI Changlei;YU Miao;ZHANG Xiaohong;Nadezhda Pavlova;WEI Yiru(Institute of Groundwater in Cold Region,Heilongjiang University,Harbin 150080,China;School of Hydraulic&Electric-power,Heilongjiang University,Harbin 150080,China;China and Russian Cold Region Hydrology and Water Conservancy Engineering Joint Laboratory,Heilongjiang University,Harbin 150080,China;Institute of Natural Sciences,North-Eastern Federal University,Yakutsk 677000,Russia;Melnikov Permafrost Institute of the Siberian Branch of the Russian Academy of Science,Yakutsk 677000,Russia)
出处
《水利学报》
EI
CSCD
北大核心
2020年第4期430-438,共9页
Journal of Hydraulic Engineering
基金
黑龙江大学研究生学术交流项目
2019年中国科协“一带一路”国际科技组织平台建设项目双边科技人文交流项目(KXPT-2019-004)
冻土工程国家重点实验室开放基金项目(SKLFSE201310)
国家自然科学基金项目(41202171)。
关键词
地下水溢流积冰
水热过程
过水通道
模拟
西伯利亚
groundwater overflow icing
hydrothermal process
water passage
simulation
Siberia
