In an insightful study published in ‘Shuitu baochi tongbao’, Wu Xiao from the Lanzhou Hydrology Station in Gansu Province has shed light on the significant potential of check dams in enhancing water resource management in the region. The research highlights the dual role of these structures in sediment retention and water utilization, which is crucial for both agricultural and ecological sustainability.
By the end of 2019, Gansu Province had constructed 1,600 check dams, ranging from large to small, collectively managing an impressive area of 4,101 square kilometers. These dams have a total capacity of nearly 482 million cubic meters, of which approximately 143 million cubic meters is currently utilized for various purposes, including drought emergencies and irrigation. Wu notes, “The remaining storage capacity of the check dams is crucial for meeting the water demands of local communities, especially in drought-prone areas.”
The study reveals that the interception capacity of these dams has been effectively utilized, with large dams accounting for over 80% of total interception. However, the research also emphasizes that many of these structures are underperforming relative to their designed capacities due to changes in soil erosion dynamics. This presents both a challenge and an opportunity for the water, sanitation, and drainage sector. The potential for upgrading existing dams and improving the design standards for new constructions could lead to enhanced water retention capabilities, ultimately benefiting agricultural productivity and local economies.
Looking to the future, Wu highlights the prospect of 147 check dams specifically designated for human consumption, irrigation, and aquaculture in key areas such as Qingyang and Tianshui. This could significantly bolster local economies by providing reliable water sources for agriculture and livestock, fostering a cycle of sustainable development. “We need to ensure that these structures not only serve immediate needs but also contribute to long-term community resilience,” Wu emphasizes.
As Gansu Province continues to navigate the challenges of water scarcity, the insights from this research can inform strategic planning and investment in water infrastructure. Establishing an early warning mechanism for risk management and enhancing flood control measures will be vital in balancing the competing demands of water storage and flood management.
In a landscape where water resources are increasingly strained, the findings from Wu Xiao’s research could pave the way for innovative approaches in the water management sector. By prioritizing the development of high-standard check dams and upgrading existing infrastructure, Gansu Province could serve as a model for other regions facing similar challenges. The implications for the water, sanitation, and drainage industry are profound, as enhanced water management practices could lead to more sustainable agricultural practices and improved livelihoods for communities across the province.
For more information, visit Lanzhou Hydrology Station.
