1 General Provisions
1.0.1 This code is formulated with a view to improving the construction quality and management level, guaranteeing the drinking water safety in the rural areas and promoting the water-saving irrigation and social and economic development.
1.0.2 This code is applicable to the planning, design, construction, acceptance and management for rainwater collection, storage and utilization in semi-arid area (where the surface water and groundwater is in shortage or difficult to exploit and utilize, and the average annual rainfall is greater than 250mm), the humid or sub-humid hilly area (with frequent seasonal water shortage), island and coastal area, while not applicable to the rainwater collection, storage and utilization in urban area.
1.0.3 The rainwater collection, storage and utilization shall be constructed and managed according to single household, household community or natural village. The construction and management must be conducted by implementing the principle of scientific planning and adaptation to local conditions under governmental guide and support based on the principle of voluntariness.
1.0.4 The rainwater collection, storage and utilization shall be implemented according to the requirements of building a moderately prosperous society in all aspects and new rural construction in combination with local conditions.
1.0.5 In addition to the requirements stipulated in this code, the planning, design, construction, acceptance and management of rainwater collection, storage and utilization shall meet those in the relevant ones of the nation.
2 Terms
2.0.1 Rainwater collection, storage and utilization
The micro water conservancy project collecting, storing and comprehensively utilizing rainwater by taking engineering measures.
2.0.2 Rainwater collection efficiency
The ratio of rainfall collected on the catchment to the rainfall in the same period.
2.0.3 Water cellar
Buried and covered rainwater storage project.
2.0.4 Water cave
The vertical caving project in the cave to form a water tank for rainwater storage.
2.0.5 Water tank
The surface rainwater storage project used to store rainfall runoff.
2.0.6 Critical period of crop water requirement
The critical period where water shortage generates the most serious effect on the growth and output of crops.
2.0.7 Irrigation with stored rainwater
The supplementary irrigation using the collected and stored rainwater.
2.0.8 Bunch irrigation
A manual direct irrigation mode for individual crop.
2.0.9 Irrigation during seeding
A partial irrigation method where special equipment or manual work are adopted to put a certain amount of water into the seed pit to improve the soil moisture content and meet the growing requirements of seed germination and seedling stages.
2.0.10 Irrigation with plastic sheeting
An irrigation method where watering is carried out above, below or beside the plastic sheeting.
Foreword I
1 General Provisions
2 Terms
3 Basic Requirement
4 Planning
5 Dimensioning and Layout of the Project
5.1 Water Supply Quota
5.2 Determination of Water Requirement
5.3 Determination of Catchment Area
5.4 Determination of the Water Storage Capacity
5.5 Project Layout
6 Design
6.1 Rainwater Collection Works
6.2 Rainwater Storage Works
6.3 Water Purification Installation
6.4 Water Supply Installation
6.5 Water Saving Irrigation System
6.6 Irrigation Scheduling with Rainwater Harvesting System
7 Construction and Installation
8 Project Acceptance
9 Engineering Management
Appendix A Catchment Area for Collecting Rainwater
Appendix B Calculation of Rainwater Storage Capacity with Rainfall Data of Typical Year and Chronological Series for Rainwater Collection, Storage and Utilization
Explanation of Wording in This Code
List of Quoted Standards
