water-management-method

name	water-management-method
description	Use when planning irrigation canals, flood control, or water resource management for agriculture. Applies Yu's principle of channeling over blocking (疏导优于堵塞) and includes the Zheng Guo Canal case study.

Water Management Method (河渠治理法)

This method outlines procedures for managing water resources, including irrigation and flood control.

Historical Foundation

Based on Yu's flood control methods: 禹抑洪水十三年，过家不入门

Core Principles

• 疏导优于堵塞
• 因地制宜
• 综合利用

Flood Control Procedures

Step 1: Survey and Planning

• Map the river course from source to sea
• Identify flood-prone areas
• Determine natural drainage patterns

Step 2: Channel Management

• 疏浚河道
• 分流泄洪
• 筑堤防护

Step 3: Emergency Response

When floods occur:

1. Assess breach location and severity
2. Mobilize workers and materials
3. Use appropriate materials:
   • 薪柴
   • 竹木
   • 石块
4. Implement temporary diversions while repairing

Irrigation Project Development

Step 1: Site Selection

• Choose land with water source access
• Assess soil quality (avoid saline land without treatment)
• Calculate gradient for gravity flow

Step 2: Canal Construction

• Main canal from water source
• Distribution network to fields
• Control structures for flow management

Step 3: Maintenance

• Regular dredging
• Embankment repair
• Seasonal adjustments

Case Study: Zheng Guo Canal

• Length: 300+ 里
• Irrigated: 40,000+ 顷
• Result: 关中为沃野，无凶年

Expected Outcomes

• Increased agricultural productivity
• Flood damage reduction
• Economic development

Validation

1. Confirm the survey covers the full river course from source to sea with flood-prone areas and natural drainage patterns identified
2. Verify that the channeling principle (疏导优于堵塞) is followed — diversion and dredging are preferred over damming alone
3. Check that maintenance schedules are established for regular dredging, embankment repair, and seasonal adjustments