Variation Regularity of Groundwater Level in the Yongding River Basin Under Ecological Replenishment

doi:10.19657/j.geoscience.1000-8527.2021.155

Abstract

Abstract:

In the spring of 2020, the ecological water replenishment in Yongding River Basin (Beijing section) was officially started on the 20^th of April. To understand the variation regularity of groundwater level in the Beijing section of the Yongding River basin and the surrounding areas under the influence of ecological water replenishment, based on the observation data of groundwater level within six months after the spring water reple-nishment in 2020, the data were classified by clustering method. Subsequently, each type of variation regularity was analyzed separately. The results show that the dynamic change types of groundwater level in Yongding River Basin under the ecological water replenishment influence can be divided into (1) continuous decline type, (2) decline type and then increase, and (3) continuous constant type, among which the groundwater level in the Beijing section, Tianjin section, and part of Hebei section shows type 2, and there is an obvious lag. However, the other parts of the Hebei section and Shanxi section show type 3, and only a few sites show type 1. These regularities can provide a technical reference for making scientific ecological water replenishment scheme.

Key words: Yongding River Basin, ecological hydration, groundwater, water-level fluctuation

CLC Number:

P641

HU Xinyu, SHEN Yuanyuan, CHU Tingwen, HE Wei, WEI Wei, SHEN Xiaopeng. Variation Regularity of Groundwater Level in the Yongding River Basin Under Ecological Replenishment[J]. Geoscience, 2023, 37(04): 986-993.

Figures/Tables 9

Fig.1 Distribution of monitoring points in the Yongding River Basin

Fig.2 Cluster analysis of selected monitoring sites in the Yongding River Basin (Beijing section)

Fig.3 Analysis chart of dimensionality reduction sites in the Yongding River Basin (Beijing section)

Fig.4 Cluster analysis of selected monitoring sites in the Yongding River Basin (Tianjin section)

Fig.5 Analysis chart of dimensionality reduction sites in the Yongding River Basin (Tianjin section)

Fig.6 Cluster analysis of selected monitoring sites in the Yongding River Basin (Hebei section)

Fig.7 Analysis charts of dimensionality reduction sites in the Yongding River Basin(Hebei section)

Fig.8 Cluster analysis of selected monitoring sites in the Yongding River Basin(Shanxi section)

Fig.9 Analysis charts of dimension reduction sites in Yongding River Basin (Shanxi section)

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