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我国西南地区水资源总量丰富，但以贵州省为中心的西南岩溶区由于特殊的岩溶地貌格局导致了水资源漏失严重，存在水资源难以利用的严重问题。因地制宜的利用岩溶峡谷河流筑坝成库，综合利用岩溶水资源成了岩溶地区高效的水利工程，岩溶地下水库是岩溶地区筑坝水库重要的一部分。目前国内外缺乏针对岩溶区地下水库库容的研究，尤其是深切峡谷地表水库伴生的岩溶地下水库库容计算与评价研究很少，没有针对性的研究方法。作为黔中水利枢纽水源工程的平寨水库正是利用岩溶峡谷深切河流筑坝成库的典型水利工程，黔中水利枢纽对解决贵州迫切的水安全问题意义不言而喻。探明平寨水库地下库容可以为岩溶筑坝河流的水量安全评估及调控对策提供科学依据。本文研究贵州高原岩溶峡谷深切河流在筑坝蓄水后的平寨水库伴生的地下水库库容，探究的是筑坝蓄水后岩溶地下介质结构的响应及调蓄能力的科学问题。本研究从库区的水文地质条件、库区岩溶地貌、库区的岩溶发育程度层面定性分析库区的岩溶地下容积空间，以库区“补-储-排”的水量均衡反推获得地下水库库容。因此本文对库区进行了地貌、地层岩性、地质构造和气象水文等综合水文地质调查，同时对库区重要岩溶洞穴进行洞穴测绘，根据测绘结果进行洞穴三维建模，从洞穴空间展布形态、容积大小、洞穴与地层、洞穴与裂隙构造的耦合关系分析库区岩溶发育情况，结合岩溶率等判断库区的地下容积空间。水文地质调查结果表明，平寨大坝以上的汇水面积为3501km2，三岔河上游干流由阳长镇汇入平寨水库中，三岔河干流月均流量达43m3/s；水库下游左岸的躲兵洞至上游阳长镇一带的库区区间面积为805km2，区间水系发达，降雨充沛，径流模数达到径流模数22.7L/s/km2；库区岩溶系统较为发育，大坝左岸岩溶洞穴呈多层状发育，四期帷幕灌浆平硐的面溶蚀率达0.06；库区地层丰富，库盆主要为永宁镇组灰岩地层，库盆两岸有三叠系下统夜郎组隔水层连续完整分布，平寨大坝两侧有黔中水利枢纽工程灌浆帷幕工程，因此，平寨水库形成倒喇叭状的良好封闭空间，没有绕坝渗漏等库水流失问题。适合使用水量均衡的方法估算获得地表水库伴生的地下水库库容。本文研究收集了整理了平寨水库2015-2018年的大坝监测统计数据，掌握了平寨水库蓄水至今的蓄水水位、地表库容、三岔河干流阳长断面入库流量、坝下出库水量等多年数据。为了验证水库大坝监测统计数据的可信度，本文研究对库区重要的研究控制点，进行了水文气象数据采集、流量巡测和高分辨率水位连续监测等工作。阳长镇的入库量对比、库区降雨、下游出库量等多组指标的高时间分辨率监测数据与水库大坝监测数据对比发现，平寨水库大坝监测的数据可信度较高，可以进行水均衡计算。在对流域的气候水文、地层岩性、构造、地貌、洞穴、岩溶率和库区封闭性等水文地质条件充分认识后，选择2015年4月至2016年12月的水库大坝监测数据，明确水均衡要素关系后，建立水均衡方程，由地表库容反推计算地下库容，刻画实际的地下库容曲线，对地下水库库容和水安全给出评价。结果得到如下结论：平寨水库的地下库容计算结果约3.21亿m3，地下库容量级大，约为地表正常蓄水量的30%，属于大型地下水库。经野外调查和岩溶溶蚀率等水文地质验证，平寨水库无绕坝渗漏等不明水量损失，认为有3亿m3量级水资源储存于地下空间中，对平寨水库水量调度有重要的参考意义。平寨水库伴生的地下水库库容较大的主要原因是库区范围内的岩溶系统丰富，峡谷型库盆两岸发育较多类似躲兵洞一样可观的地下含水空间。有四期岩溶洞穴主要发育见于地表正常蓄水位以下，层状分布的岩溶系统提供了优越的储水空间。根据岩溶地貌特征结合野外实地调查，从水文地质条件来看，平寨水库伴生的地下水库的库容空间主要集中在大坝到扈家河一线的水库左岸带。平寨水库坝首帷幕渗漏问题与坝首复杂连通的岩溶系统有关。初步判定坝首左岸灌浆帷幕内多期岩溶洞穴之间复杂连通，可能形成较大的地下储水空间。由于平寨水库伴生的地下水库库容较大，地下库容有其重要的水安全意义，包括岩溶地质环境安全意义，应该重新评估平寨水库的水量安全问题。

The The total amount of water resources in southwestern China is abundant, but the southwestern karst area centered on Guizhou Province has caused serious water loss due to the special karst landform pattern, and there is a serious problem that water resources are difficult to use. The use of karst canyons to build dams into reservoirs, the comprehensive utilization of karst water resources has become an efficient water conservancy project in karst areas, and karst groundwater reservoirs are an important part of dam-building reservoirs in karst areas. At present, there is a lack of research on the storage capacity of groundwater reservoirs in karst areas, especially the study of reservoir capacity calculation and evaluation of karst groundwater reservoirs associated with deep-cut canyon surface reservoirs, and there is no targeted research method. As the water source project of the Central GuizhouWater Conservancy Project, the Pingzhai Reservoir is a typical water conservancy project that utilizes the deep dam of the karst canyon to build a dam. The Central GuizhouWater Control Project is self-evident for solving the urgent water safety problem in Guizhou. Exploring the underground storage capacity of Pingzhai Reservoir can provide a scientific basis for the water quantity safety assessment and control measures of karst dam-building rivers.This paper studies the associated underground reservoir storage capacity of the Pingzhai Reservoir after the dam construction and storage of the deep-cut rivers in the karst canyons of Guizhou Plateau. It explores the scientific problems of the response and storage capacity of karst underground media structures after dam storage. In this study, the karst underground volume space in the reservoir area is qualitatively analyzed from the hydrogeological conditions in the reservoir area, the karst landform in the reservoir area, and the karst development degree in the reservoir area. The groundwater reservoir is obtained by the water balance of the reservoir area “complement-storage-discharge”. Storage capacity. Therefore, the comprehensive hydrogeological surveys of geomorphology, stratum lithology, geological structure and meteorological hydrology are carried out in the reservoir area. At the same time, cave mapping is carried out on the important karst caves in the reservoir area. Three-dimensional modeling of the cave is carried out according to the surveying results, and the space form is expanded from the cave. The coupling relationship between the volume, the cave and the stratum, the cave and the fissure structure is used to analyze the karst development in the reservoir area, and the karst rate is combined to determine the underground volume of the reservoir area.The hydrogeological survey results show that the catchment area above the Pingzhai dam is 3501km2, and the upper stream of the upper reaches of the Sancha River is merged into the Pingzhai Reservoir by Yangchang Town. The average monthly flow of the Sancha River main stream is 43m3/s; the left bank of the reservoir downstream The area of the reservoir area from the hiding point to the upper Yangchang Town is 805km2, the interval water system is developed, the rainfall is abundant, the runoff modulus reaches the runoff modulus 22.7L/s/km2; the karst system in the reservoir area is relatively developed, and the karst cave on the left bank of the dam In the multi-layered development, the surface erosion rate of the fourth-stage curtain grouting flat is 0.06; the reservoir area is rich, the basin is mainly the Yongningzhen group limestone stratum, and the Triassic Lower Jubilee Yelang Formation is continuous on both sides of the basin. Completely distributed, there are grouting curtain works on the sides of the Pingzhai Dam on both sides of the Pingzhai Dam. Therefore, the Pingzhai Reservoir has a good closed space with a trumpet-like shape, and there is no problem of reservoir water loss such as leakage around the dam. It is suitable to use the method of water balance to estimate the storage capacity of the groundwater reservoir associated with the surface reservoir.This paper collected and collected the dam monitoring statistics of Pingzhai Reservoir in 2015-2018, and mastered the water storage level, surface storage capacity, and the storage flow of the Yangchang section of the Sanchahe River. The amount of water in the reservoir is many years of data. In order to verify the credibility of the reservoir dam monitoring statistics, this paper studies the important research control points in the reservoir area, and carries out hydrometeorological data collection, flow patrol and continuous high-resolution water level monitoring. The high time resolution monitoring data of Yangchang Town's storage volume comparison, reservoir area rainfall, downstream outbound volume and other indicators are compared with the reservoir dam monitoring data. The data of the Pingzhai Reservoir dam monitoring is highly reliable. , water balance calculation can be performed.After fully understanding the hydrogeological conditions such as climate hydrology, stratum lithology, structure, geomorphology, caves, karst rate and reservoir closure, the reservoir dam monitoring data from April 2015 to December 2016 was selected. After the relationship between the water balance elements, the water balance equation is established, and the underground storage capacity is calculated from the surface storage capacity, and the actual underground storage capacity curve is depicted to evaluate the underground reservoir capacity and water safety. The result is as follows:1) The calculation result of the underground storage capacity of Pingzhai Reservoir is about 321 million m3. The underground storage capacity is large, about 30% of the normal surface water storage, and belongs to the large underground reservoir.2) After field investigation and karst dissolution rate and other hydrogeological verification, Pingzhai Reservoir has no loss of water loss such as dam leakage, and it is believed that 300 million m3 of water resources are stored in underground space, which is important for water regulation of Pingzhai Reservoir. The meaning of the reference.3) The main reason for the large storage capacity of the groundwater reservoir associated with the Pingzhai Reservoir is that the karst system is abundant in the reservoir area, and the two sides of the canyon-type reservoir basin develop more underground water-bearing spaces similar to the hiding of the arsenal. There are four stages of karst caves that are mainly developed below the normal surface water level, and the layered karst system provides superior water storage space.4) According to the karst landform characteristics combined with the field investigation, from the hydrogeological conditions, the storage space of the underground reservoir of the Pingzhai Reservoir is mainly concentrated in the left bank of the reservoir from the dam to the Hujiahe River.5) The leakage of the curtain at the head of the Pingzhai Reservoir is related to the complex karst system of the dam. It is preliminarily determined that there is a complex connection between the multi-stage karst caves in the grouting curtain on the left bank of the dam, which may form a large underground water storage space.6) Because the underground reservoir of the Pingzhai Reservoir has a large storage capacity, the underground storage has important water safety significance, including the safety significance of the karst geological environment, and the water safety of the Pingzhai Reservoir should be re-evaluated.