In the Almanac, "Building Embankments" (筑堤 - Zhu Di) usually refers to the act of building or reinforcing water conservancy facilities such as river embankments and dams. This activity was particularly important in ancient China because the country frequently suffered from flood disasters throughout its history, and an effective dike system could greatly reduce the damage caused by floods.
Historical Background
- Importance of Ancient Water Conservancy Projects: Since ancient times, China has attached great importance to water conservancy construction. As early as the era of Yu the Great controlling the waters, there was already the practice of managing floods by dredging rivers. After the Qin and Han dynasties, with the development of social economy, people's demand for water conservancy facilities became more urgent.
- Controlling the Yellow River: As the mother river of the Chinese nation, the Yellow River is also one of the most difficult rivers to manage in history. Due to its massive sediment load, the Yellow River easily forms an "above-ground river" (suspended river). Once the embankment breaches, it brings disastrous consequences to downstream areas. Therefore, successive dynasties viewed Yellow River management as a major state affair.
Significance in the Almanac
The traditional Almanac records the auspiciousness, taboos, and suitable matters for each day, and "Building Embankments" is often listed as an important agricultural activity. This is because the ancients believed that carrying out embankment-building work on specific dates could receive the blessings of the deities, making the project proceed smoothly, and enabling the completed dikes to better withstand natural disasters.
Implementation Process
- Site Selection and Planning: Selecting an appropriate embankment site based on factors such as river course and geological conditions, and formulating a detailed construction plan.
- Material Preparation: Mainly including building materials such as earthwork and stone. Among them, selecting hard stones with poor water absorption as the foundation material is the key to ensuring the stability of the dike.
- Construction Techniques: Although ancient times lacked the help of modern mechanical equipment, people invented many ingenious methods to improve work efficiency, such as using the principle of leverage to carry heavy objects and adopting segmented operation methods.
- Post-construction Maintenance: After the embankment is built, regular inspections and repairs are required to ensure it exerts a long-term flood prevention role.
Relationship with the Almanac
- Selecting a Date for Breaking Ground: Before deciding when to start building an embankment, the ancients would consult the Almanac to pick a day considered auspicious (the so-called "Auspicious Day for Breaking Ground") to commence construction.
- Worship Ceremonies: A simple worship ceremony is often held before construction begins, praying to heaven for a safe and smooth project.
- Points to Note: The Almanac will also remind people to pay attention to problems that may be encountered during the construction process and their solutions, such as how to avoid destroying the Feng Shui layout.
In conclusion, "Building Embankments" is a major project related to the people's livelihood and well-being, holding an extremely important position in ancient Chinese society. As a traditional cultural heritage, the Almanac not only reflects the ancestors' understanding of natural laws but also embodies their beautiful wishes for the harmonious coexistence of humanity and nature.
