Name: Quxue Dam: Rock-fill Hydroelectric Infrastructure in Sichuan
Address: CN

Overview

The Quxue Dam is an operational hydroelectric power plant located in Dêrong County, Sichuan Province, China. The facility is situated on the Shuoqu River and functions as a key component of the regional energy infrastructure. The dam structure is classified as a rock-fill embankment dam, reaching a height of 174 m (571 ft). This structural design allows for the effective management of water flow from the Shuoqu River, which serves as the primary fuel source for the hydroelectric generation process.

The power station has an installed capacity of 246 MW. The facility was commissioned in 2016, marking the beginning of its operational history in the Sichuan energy grid. As a hydroelectric powerplant, the Quxue Dam converts the potential energy of water stored behind the rock-fill embankment into electrical energy. The operational status of the plant is currently active, contributing to the power supply in the administrative region of Dêrong County and the broader Sichuan Province network.

The location of the Quxue Dam in Dêrong County places it within a geographically significant area of Sichuan Province, China. The Shuoqu River provides the necessary hydraulic head and flow volume required to sustain the 246 MW output. The construction of the 174 m tall rock-fill embankment represents a substantial engineering effort to harness the water resources of the Shuoqu River. The commissioning in 246 MW capacity indicates the scale of the hydroelectric infrastructure deployed in this specific river basin.

Geography and Site Conditions

The Quxue Dam is situated on the Shuoqu River, a tributary within the complex hydrological network of southwestern China. The specific location of the project is in Dêrong County, which is part of Sichuan Province. This region is characterized by rugged topography and significant elevation changes, typical of the transition zone between the Tibetan Plateau and the Sichuan Basin. The placement of the dam on the Shuoqu River allows for the harnessing of water resources in an area with substantial hydraulic head potential, contributing to the operational status of the facility as a hydroelectric powerplant with a capacity of 246 MW. The site selection reflects the strategic importance of leveraging local water bodies for energy generation in this part of CN. The Shuoqu River serves as the primary fuel source for the plant, with water flow regulated by the 174 m tall rock-fill embankment structure. The geographical context of Dêrong County provides the necessary catchment area and elevation gradient required for effective hydroelectric conversion. The dam's integration into the local landscape is a key aspect of its engineering design, balancing structural requirements with the natural contours of the river valley. The operational status of the Quxue Dam, commissioned in 2016, indicates the successful adaptation of the infrastructure to the specific geographical conditions of the Shuoqu River. The location in Sichuan Province places the dam within a major energy-producing region of China, where hydroelectric resources are extensively utilized. The Shuoqu River's flow characteristics, influenced by the surrounding terrain, are critical to the dam's performance and energy output. The geographical setting also influences the logistical considerations for maintenance and operation of the 246 MW facility. The rock-fill embankment design is particularly suited to the geological and topographical features of the Shuoqu River site in Dêrong County. This construction method allows for flexibility in adapting to the uneven ground conditions often found in mountainous river valleys. The dam's height of 174 m is a direct response to the need to create sufficient reservoir capacity and head pressure given the specific slope and width of the Shuoqu River at this location. The surrounding area of Dêrong County provides the necessary land for the reservoir and the dam structure itself. The geographical isolation of some parts of the region may have influenced the construction timeline and the eventual commissioning date of 2016. The Shuoqu River's role in the local ecosystem and hydrology is modified by the presence of the dam, affecting downstream flow and sediment transport. The location in Sichuan Province ensures that the Quxue Dam is connected to the broader regional power grid, facilitating the distribution of the generated electricity. The geographical features of the site, including the river's course and the adjacent landforms, were carefully analyzed during the planning phase to optimize the dam's efficiency. The rock-fill material used in the embankment is likely sourced from the immediate vicinity of the Shuoqu River, taking advantage of local geological deposits. This reduces transportation costs and environmental impact compared to importing materials from distant locations. The steep terrain of Dêrong County presents both challenges and opportunities for hydroelectric development. The Quxue Dam represents a significant engineering achievement in adapting to these specific geographical constraints. The operational success of the dam relies on the continuous monitoring of the Shuoqu River's behavior, including seasonal variations in water level and flow rate. The location of the dam on the Shuoqu River is central to its function as a hydroelectric powerplant, converting the potential energy of the water into electrical energy for the region. The geographical context of Sichuan Province, with its abundant water resources and mountainous terrain, makes it an ideal location for such infrastructure. The Quxue Dam's position in Dêrong County contributes to the local economy and energy security of the area. The Shuoqu River's characteristics, such as its gradient and volume, are essential factors in determining the dam's design parameters, including its height and capacity. The rock-fill embankment structure is designed to withstand the specific hydrological and geological forces present at the Shuoqu River site. The geographical setting also influences the environmental impact assessments conducted during the planning and construction phases of the Quxue Dam. The location in China's Sichuan Province places the dam within a region with a long history of hydroelectric development, benefiting from established engineering practices and technological expertise. The Shuoqu River's role in the local landscape is transformed by the dam, creating a reservoir that serves multiple purposes, including power generation and potentially flood control. The geographical features of Dêrong County, including its elevation and climate, affect the operational parameters of the Quxue Dam. The dam's commissioning in 2016 marks the culmination of efforts to harness the energy potential of the Shuoqu River in this specific geographical location. The 246 MW capacity of the Quxue Dam is a result of the specific geographical and hydrological conditions of the Shuoqu River in Dêrong County. The rock-fill embankment design is a testament to the engineering solutions developed to address the unique challenges of the site. The geographical context of the Shuoqu River is integral to understanding the function and significance of the Quxue Dam as a hydroelectric powerplant in China.

Engineering Design and Specifications

The Quxue Dam is a rock-fill embankment structure situated on the Shuoqu River in Dêrong County, Sichuan Province, China. With a height of 174 m, it represents a significant civil engineering project within the regional hydroelectric infrastructure. The dam utilizes a rock-fill construction method, which is common for high-head hydroelectric projects in mountainous terrains where local aggregate materials are abundant. This structural type allows for flexibility and effective load distribution across the foundation, accommodating the geological conditions of the Shuoqu River valley. The primary function of the embankment is to create a reservoir that feeds the associated hydroelectric power station, which has an installed capacity of 246 MW and was commissioned in 2016.

Specific technical dimensions such as the crest length, crest width, and the precise gradients of the upstream and downstream slopes are critical parameters in the dam's engineering profile. The rock-fill material is typically compacted in layers to ensure density and minimize settlement over the operational life of the dam. The upstream face is often protected by an impervious membrane or concrete slabs to prevent seepage, while the downstream slope is graded to ensure stability against hydrostatic and seismic forces. The structural integrity of the 174 m high embankment relies on the quality of the rock fill and the efficiency of the drainage systems integrated within the body of the dam.

Parameter	Value
Dam Type	Rock-fill embankment
Height	174 m
Location	Shuoqu River, Dêrong County, Sichuan
Country	China
Commissioning Year	2016
Installed Capacity	246 MW
Crest Length	[?]
Crest Width	[?]
Upstream Slope	[?]
Downstream Slope	[?]

The engineering design of the Quxue Dam reflects standard practices for high rock-fill dams in China, prioritizing durability and hydraulic efficiency. The absence of specific data on crest dimensions and slope gradients in the primary source material limits the detailed geometric analysis. However, the 174 m height places it among the taller rock-fill structures in the Sichuan basin, requiring robust foundation treatment and careful monitoring of settlement and seepage. The dam's operational status remains active, contributing to the energy mix of the region through its 246 MW output. Further technical documentation would be required to detail the specific rock-fill gradation, core wall composition, and spillway integration, which are essential for a complete engineering specification.

Construction History and Timeline

Construction of the Quxue Dam commenced in 2013, marking the beginning of the infrastructure project on the Shuoqu River in Dêrong County, Sichuan Province. The initial phase focused on site preparation and the establishment of access routes to the dam location. The project involved the construction of a 174 m (571 ft)-tall rock-fill embankment dam, which serves as the primary water retention structure for the hydroelectric powerplant.

A critical milestone in the construction timeline occurred in February 2014, when the river diversion was successfully executed. This engineering operation allowed construction crews to work on the main dam body and the powerhouse foundation with reduced water flow interference. The diversion process is a standard but complex procedure in hydroelectric construction, requiring precise timing to manage seasonal water levels on the Shuoqu River.

Following the river diversion, the main structural works progressed through the filling of the rock-fill embankment and the installation of the hydroelectric generating equipment. The power station was completed in 2016, coinciding with the official commissioning of the facility. The completed plant has an installed capacity of 246 MW, contributing to the regional energy grid in China. The project remained operational following its 2016 commissioning, utilizing the water resource of the Shuoqu River for power generation.

Construction Timeline

Year	Event
2013	Construction of the Quxue Dam begins
February 2014	River diversion completed on the Shuoqu River
2016	Power station completed and commissioned; operational status achieved

What are the engineering challenges of building in a steep canyon?

The construction of the Quxue Dam on the Shuoqu River in Dêrong County, Sichuan Province, China, presented significant geological and topographical challenges inherent to high-altitude canyon environments. As a 174 m (571 ft)-tall rock-fill embankment structure, the dam’s design had to accommodate the steep gradient of the river valley, which features bank slopes reaching approximately 70° in sections. Such extreme inclines complicate foundation preparation, access logistics, and the stability of the abutments, requiring precise geotechnical assessment and robust engineering solutions to prevent slippage and ensure long-term structural integrity.

Geological Stability and Abutment Design

The 70° bank slopes of the Shuoqu River canyon create a complex stress distribution for the dam’s abutments. In rock-fill embankment dams, the interface between the fill material and the natural rock foundation is critical. Steep slopes increase the risk of differential settlement and potential shear failure if the foundation rock is not adequately compacted or keyed into the bedrock. The engineering team addressed these challenges by selecting a rock-fill design, which offers greater flexibility than concrete gravity dams, allowing the structure to adapt to minor foundation movements without cracking. This type of embankment is particularly suited to the variable geology often found in Sichuan’s mountainous terrain, where the Shuoqu River cuts through diverse rock strata.

Sediment Management and Mobile Deposits

Mobile sediment is a major concern for hydroelectric projects in the Sichuan region, where seasonal monsoons and upstream erosion contribute to high sediment loads in the Shuoqu River. The Quxue Dam’s design incorporates strategies to manage this sediment flux, which can reduce reservoir capacity and increase wear on turbine components. Rock-fill dams often utilize specific filter layers and drainage systems to prevent internal erosion caused by sediment-laden water. Additionally, the dam’s height of 174 m provides a substantial reservoir volume, helping to trap coarse sediments before they reach the powerhouse. The operational strategy likely includes periodic drawdowns or flushing mechanisms to mitigate sediment accumulation, ensuring the 246 MW generating capacity remains efficient over time.

Commissioned in 2016, the Quxue Dam stands as a testament to the engineering capabilities required to harness the hydroelectric potential of China’s western highlands. The successful integration of the 174 m rock-fill structure into the steep 70° slopes of the Shuoqu River demonstrates how modern dam engineering can overcome severe topographical constraints. By addressing the dual challenges of abutment stability and mobile sediment, the project ensures reliable power generation for the region while maintaining the structural resilience necessary for long-term operation in a dynamic geological setting.

Hydroelectric Power Generation

The Quxue Dam integrates a 246 MW hydroelectric power station, commissioned in 2016, serving as a key energy asset within Sichuan Province’s regional grid infrastructure. The facility utilizes the hydraulic head provided by the 174 m (571 ft)-tall rock-fill embankment structure to drive turbine generators, converting the potential energy of the Shuoqu River into electrical output. As an operational hydroelectric plant, the Quxue facility contributes to the baseload and peaking power requirements of the local distribution network, leveraging the consistent flow characteristics of the river system in Dêrong County. The rock-fill embankment design allows for effective water retention and head management, critical for maintaining efficient turbine performance across varying seasonal flow rates. The power station’s integration into the provincial grid enhances energy security for the region, providing a renewable source of electricity that complements other hydro and thermal generation assets in Sichuan. Operational aspects focus on maintaining the structural integrity of the dam and the mechanical efficiency of the generating units, ensuring continuous power delivery to connected substations and transmission lines. The plant’s location on the Shuoqu River positions it strategically within the broader hydroelectric development corridor of the province, maximizing the utilization of water resources for energy production. As an operational facility since 2016, the Quxue Dam continues to play a vital role in the local energy mix, demonstrating the effectiveness of large-scale rock-fill dam technology in harnessing riverine energy for sustained electrical output. The 246 MW capacity represents a significant contribution to the regional power supply, supporting both industrial and residential demand in the surrounding areas of Dêrong County and beyond.

Significance

The Quxue Dam represents a significant component of the hydroelectric infrastructure within the Garzê Tibetan Autonomous Prefecture, located in Sichuan Province, China. As a 174 m (571 ft)-tall rock-fill embankment dam, it serves as a critical node in the regional energy grid, contributing 246 MW of installed capacity to the province's power generation mix. The facility is situated on the Shuoqu River in Dêrong County, leveraging the natural hydraulic head of the river to drive its operational output. Since its commissioning in 2016, the dam has been in operational status, providing a consistent source of renewable energy to the surrounding areas and the broader Sichuan network.

In the context of Sichuan Province’s hydroelectric development, the Quxue Dam exemplifies the strategic exploitation of the province's abundant water resources. Sichuan is one of China's leading producers of hydroelectric power, and projects like Quxue are essential for meeting the growing energy demands of both local communities and industrial centers. The dam’s location in the Garzê Tibetan Autonomous Prefecture highlights the region's potential for energy production, which is crucial for economic development and infrastructure improvement in this largely mountainous area. The Shuoqu River, a tributary in the region, provides the necessary flow and elevation drop required for efficient power generation.

Regional Energy Contribution

The operational status of the Quxue Dam ensures a steady supply of electricity to the Garzê Tibetan Autonomous Prefecture. This contribution is vital for stabilizing the local grid and supporting the energy needs of Dêrong County and neighboring districts. The 246 MW capacity allows the dam to play a meaningful role in balancing the load on the regional power system, particularly during peak demand periods. By harnessing the water from the Shuoqu River, the dam reduces reliance on other energy sources, thereby enhancing the sustainability of the local energy infrastructure. The rock-fill embankment design is well-suited to the geological conditions of the area, ensuring long-term stability and efficiency.

Furthermore, the Quxue Dam supports the broader goals of Sichuan Province’s energy strategy, which emphasizes the expansion of hydroelectric capacity to meet future energy demands. The project aligns with the province's efforts to diversify its energy portfolio and increase the share of renewable energy sources. The dam’s commissioning in 2016 marked a milestone in the development of the Shuoqu River basin, demonstrating the feasibility of large-scale hydroelectric projects in the Garzê Tibetan Autonomous Prefecture. This development not only boosts local energy security but also contributes to the economic growth of the region by creating jobs and improving infrastructure.

The significance of the Quxue Dam extends beyond its immediate energy output. It serves as a model for future hydroelectric projects in the Garzê Tibetan Autonomous Prefecture, showcasing the potential for leveraging the region's natural resources for sustainable development. The dam’s successful operation since 2016 provides valuable data and insights for planning and executing similar projects in the area. As Sichuan Province continues to expand its hydroelectric capacity, the Quxue Dam remains a key asset in the regional energy landscape, contributing to the province's status as a major hydroelectric power hub in China.