陈晓宏, 颜依寒, 李诚, 危润初. 溶蚀丘陵型岩溶流域概念性水文模型及其应用[J]. 水科学进展, 2020, 31(1): 1-9. DOI: 10.14042/j.cnki.32.1309.2020.01.001
引用本文: 陈晓宏, 颜依寒, 李诚, 危润初. 溶蚀丘陵型岩溶流域概念性水文模型及其应用[J]. 水科学进展, 2020, 31(1): 1-9. DOI: 10.14042/j.cnki.32.1309.2020.01.001
CHEN Xiaohong, YAN Yihan, LI Cheng, WEI Runchu. Conceptual hydrological model of corrosional hill karst watershed and its application[J]. Advances in Water Science, 2020, 31(1): 1-9. DOI: 10.14042/j.cnki.32.1309.2020.01.001
Citation: CHEN Xiaohong, YAN Yihan, LI Cheng, WEI Runchu. Conceptual hydrological model of corrosional hill karst watershed and its application[J]. Advances in Water Science, 2020, 31(1): 1-9. DOI: 10.14042/j.cnki.32.1309.2020.01.001

溶蚀丘陵型岩溶流域概念性水文模型及其应用

Conceptual hydrological model of corrosional hill karst watershed and its application

  • 摘要: 为弥补传统概念性水文模型在岩溶水文模拟上的缺陷,基于三水源新安江模型,采用多个线性水库表达岩溶地下系统的异质性,同时引入流域虚拟面积系数修正岩溶流域的非闭合性。将改进的概念性水文模型应用于湘中南典型溶蚀丘陵型岩溶流域,并在此基础上探讨岩溶流域非闭合性的动态变化。研究结果表明:①改进模型的日径流模拟精度提高11.21%,水量平衡误差及低水误差分别降低23.29%、27.64%;②岩溶地下汇流系统的多向性导致流域非闭合状态具有双重性;③地下汇流面积与时段降雨量呈正相关,然而受地下饱和程度的制约,地下汇流面积的变化率随时段降雨量的增大而减小;④由于岩溶地貌的蓄水滞水作用,地下流域受外侧补给的过程存在滞后性。模型的改进与拓展研究可为岩溶水文模拟提供新思路。

     

    Abstract: To mitigate the insufficiency of the traditional hydrological model in karst hydrological simulation, the Xin'anjiang Hydrological Model was modified by reconstructing a heterogeneous groundwater system with linear reservoirs and introducing the virtual area coefficient of the watershed (f) to modify non-conservative characteristics. The modified Karst Hydrological Model was applied to the Chongling River Basin, a typical corrosional hill region of southern Hunan Province, China. In addition, this study focused on dynamic changes of non-conservative characteristics based on the modified model. The results demonstrate the following:① The modified model outperformed the Xin'anjiang Model in karst hydrologic simulation (by 11.21%) especially in water balance (by 23.29%) and low water flow (by 27.64%); ② The non-conservative status of the karst watershed has duality because of the multi-directionality of the underground confluence system; ③ The area of the underground system is positively correlated with precipitation, while the variation of the area decreases with the increase of the precipitation by the constraint of underground saturation; ④ Inter-catchment water exchange exhibits time lag because of the hydration and water retention of karst.

     

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