Analysis of the critical relationship between the water levels of Dongting Lake and Chenglingji station
-
摘要: 采用典型测站观测资料与水力学原理相结合,分析不同情况下城陵矶水位与洞庭湖区水位关联性强弱转化的机理和临界条件以及三峡水库对其影响等问题。理论解析表明,固定流量下,湖区水位与城陵矶水位相关关系应为单调指数函数,受到区间距离、湖槽形态等多因素影响,据此提出和率定了各湖区水位的经验计算模式。利用经验计算模式对实测数据进行延展,构建了各种可能出现的湖区来流和干流水位组合下的湖区水位特征曲线族,发现湖区水位与城陵矶水位之间的关联强度存在无影响区、影响区和决定区等状态区间,通过对临界条件的定义和计算,实现了各状态区间的定量划分,并提出了各状态区间内洞庭湖区水位的估算方法。通过对三峡水库蓄水后湖床冲淤和水文条件变化的影响分析,论证了以上方法和认识在水库蓄水后的适用性。Abstract: The relationship between the water levels in Dongting Lake and Chenglingji station was investigated using long-term hydrology data record and the hydraulics theory. The mechanisms of the changing water level relationship between the two regions were discussed, and the critical condition in the changing process was analyzed. Furthermore, the impact of the Three Georges Project on the water level linkage was examined. Theoretical analysis showed that the relationship between the water levels in Dongting Lake and Chenglingji station agreed with the monotonic exponential function under fixed discharge. Considering distance and morphology of the lake bed, an empirical model was established to estimate the water level in Dongting Lake. Based on the empirical model, the water level variations of the Dongting Lake was estimated all throughout the ranges of inflow discharges and water level stages at the lake outlet by extrapolation from the observed data. Based on these calculations, rating curves of the water level relationships between Dongting Lake and Chenglingji station were established with lake inflow as parameters. Therefore, it was found that the combination of inflow discharge and water level at Chenglingji station can be divided into three types, as follows:no-effect zone, influencing zone, and determining zone in the coordinate plane. Based on the definition of critical condition, the threshold lines between the three zones were quantitatively determined. The water level estimation methods in different parts of the lake under the conditions of the three zones were proposed separately. Finally, the impact of the Three Georges Project on the critical condition and threshold lines were evaluated along with the observed data. The hydraulic linkage between Dongting Lake and Chenglingji station slightly changed after dam impoundment.
-
Keywords:
- correlation between water levels /
- backwater effect /
- Dongting Lake /
- Yangtze River
-
-
期刊类型引用(18)
1. 何中政,钱伟,傅春,蔡思宇,陈甜. 基于逐步回归分析的峡江水库对吉安水位顶托作用量化分析. 中国农村水利水电. 2024(07): 53-59 . 百度学术 2. 何熙,郝岭,邓涯,李顺超,曹民雄. 岷江河口汇流特征及浅滩整治水位. 水科学进展. 2024(04): 645-656 . 本站查看 3. 尚海鑫,胡春宏,夏军强,周美蓉. 洞庭湖入汇对荆江河段水位的顶托程度与范围. 水科学进展. 2023(03): 431-441 . 本站查看 4. 巫丹,娄明月,刘广兵,刘淼. 基于水源地目标控制的入江支流磷通量阈值研究. 人民长江. 2023(09): 50-59 . 百度学术 5. 谷桂华,朱文祥. 滇中地区降雨侵蚀力特征研究——以玉溪市为例. 中国水土保持. 2023(10): 60-65 . 百度学术 6. 张睿芝,戴凌全,戴会超,刘亚新,蔡卓森,刘芬. 基于改进LSTM模型的三峡水库蓄水对洞庭湖水位影响的空间异质性分析. 水利水电技术(中英文). 2022(02): 98-108 . 百度学术 7. 杨云平,李明,刘万利,朱玉德,杨丽洁,余文钧. 长江荆江河段滩槽演变与航道水深资源提升关系. 水科学进展. 2022(02): 240-252 . 本站查看 8. 张龚泉,岳建平,刘胜男,王海龙,杨智翔,周航宇. 基于遥感影像的鄱阳湖地形提取方法. 测绘通报. 2022(05): 62-66+73 . 百度学术 9. 戴凌全,王煜,汤正阳,戴会超,任玉峰,常曼琪,吴倩,毛劲乔. 三峡水库枯水期补水调度对洞庭湖越冬白鹤(Grus leucogeranus)摄食栖息地的影响. 湖泊科学. 2022(04): 1208-1218 . 百度学术 10. 张明月,邓鹏鑫,王磊之,邴建平,张冬冬,程小翠. 鄱阳湖汇流顶托对长江汉口水位影响的量化分析. 湖泊科学. 2022(05): 1712-1722 . 百度学术 11. 于珊,李一平,程一鑫,施媛媛,程月,黄亚男,朱雅,潘泓哲,岳桢铻,郑可. 调水引流工程对平原河网水动力调控的效果. 湖泊科学. 2021(02): 462-473 . 百度学术 12. 孙昭华,周歆玥,范杰玮,熊海滨,谈广鸣. 考虑回水影响的河道水位—流量关系确定方法. 水科学进展. 2021(02): 259-270 . 本站查看 13. 谢康,张晓菁,卫晓婧,刘攀,宋平,郑颖,谢南. 洞庭湖流域未控区间水量平衡分析. 水资源研究. 2019(01): 44-55 . 百度学术 14. 程俊翔,徐力刚,姜加虎,朱乾德,于丹丹. 洞庭湖出口径流变化及对生态系统的影响. 长江流域资源与环境. 2019(05): 1225-1234 . 百度学术 15. 隆院男,闫世雄,蒋昌波,吴长山,李志威,唐蓉. 基于多源遥感影像的洞庭湖地形提取方法. 地理学报. 2019(07): 1467-1481 . 百度学术 16. 张冬冬,戴明龙,徐高洪,邓鹏鑫. 三峡水库蓄水期洞庭湖出湖水量变化. 水科学进展. 2019(05): 613-622 . 本站查看 17. 付湘,赵秋湘,孙昭华. 三峡水库175 m试验性蓄水期调度运行对洞庭湖蓄水量变化的影响. 湖泊科学. 2019(06): 1713-1725 . 百度学术 18. 张洪波,曹巍,张双虎,张艳平. 人类活动对洞庭湖区荆南三河径流变化的定量影响. 地球科学与环境学报. 2018(01): 91-100 . 百度学术 其他类型引用(5)
计量
- 文章访问数: 196
- HTML全文浏览量: 46
- PDF下载量: 512
- 被引次数: 23