Segmented Rice Field Runoff Control via Sub-Parcel Flow Regulation
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Solution Overview
Problem
Conventional systems for controlling rice field non-point source pollution are inefficient in maximizing the reduction of nitrogen and phosphorus contaminants during storm periods due to limited storage capacity and complex facility requirements.
Innovation Solution
An integrated device comprising water receiving pipes, water reservoirs, rice fields divided into sub-parcels with regulating gates, and detection systems for controlling water flow and contaminant concentration, allowing for efficient storage and treatment of initial runoff pollution by utilizing a plug flow operation mode and accumulation treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional ecological ditch systems and paddy wetlands are used to control rice field non-point source pollution, then the system provides basic contaminant elimination function, but the utilization efficiency is limited by the capacity of the ditch and rice field, resulting in inability to maximize contaminant reduction during storm periods
Solution Approach 1:
The rice field is divided into multiple sub-parcels (first sub-parcel, second sub-parcel, third sub-parcel) with different functions: the first sub-parcel serves as a collection area for initial runoff, the second sub-parcel as a storage area, and the third sub-parcel as a discharge area. This segmentation allows the system to maximize storage capacity and contaminant retention time during storm periods, directly addressing the limitation of conventional systems with insufficient storage capacity.
Solution Approach 2:
The invention introduces a temporal dimension to the contaminant elimination process by implementing a multi-stage, time-sequenced flow control system. Runoff is collected, stored, and discharged in a specific sequence over time, allowing the system to retain contaminants for extended periods and maximize elimination efficiency during and after storm events, rather than relying solely on spatial capacity.
2Productivity
If complex facilities such as multiple pumps, valves, and sensors are introduced to improve contaminant control, then the system can achieve better pollution control, but the device complexity increases
Solution Approach 1:
The invention employs dynamic, time-varying control strategies where the flow paths between sub-parcels are adjusted based on real-time conditions such as rainfall intensity and contaminant concentration. Regulating gates and control valves dynamically redirect water flow to optimize contaminant retention and elimination, achieving high pollution control effectiveness without requiring complex fixed infrastructure.
Solution Approach 2:
The system utilizes the natural characteristics of the rice field ecosystem, including vegetation, soil, and microbial communities, to perform contaminant elimination. The rice field itself serves as the primary treatment mechanism through natural processes such as plant uptake, microbial degradation, and sedimentation, reducing the need for additional complex mechanical treatment facilities.
3Object-generated harmful factors
If the rice field is used as an ecological wetland to transform nitrogen and phosphorus, then the system provides contaminant elimination function, but the storage capacity is limited during storm periods
Solution Approach 1:
The system performs preliminary collection and storage of initial runoff in the first and second sub-parcels before discharge to the third sub-parcel. This preliminary action allows the rice field to treat high-concentration contaminants from the initial runoff phase separately, maximizing contaminant elimination efficiency while preventing overflow during intense storm periods by temporarily storing excess water.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively accumulates and treats high-concentration initial runoff, maximizing contaminant retention time in the rice field ecosystem, thereby reducing water eutrophication risks and improving contaminant elimination efficiency.
Implementation Method 1
the rice field can be defined as a shallow water wetland which greatly influences the transformation processes of nitrogen and phosphorus in the surface runoff
Implementation Method 2
the rice field ecosystem to decrease the nutrients contamination such as N and P in the initial runoff
Implementation Method 3
a plurality of water receiving pipes for collecting initial runoff are gathered and connected with the first water reservoir
Implementation Method 4
The system effectively accumulates and treats high-concentration initial runoff, maximizing contaminant retention time in the rice field ecosystem
Implementation Method 5
rice fields divided into sub-parcels with regulating gates, and detection systems for controlling water flow
Data Source
AI summary
An integrated eliminating device and its method for initial runoff pollution is provided, wherein a plurality of the water receiving pipes for collecting initial runoff are gathered and connected to the first water reservoir, one end of the water inlet pump is connected with the first water reservoir via the water receiving pipes, and the other end of the intake pump is connected with an water inlet opening of the rice field; the rice field is divided into a plurality of sub-parcels in a shape of long stripes, a regulating gate is set. An outlet of the rice field is communicated with the second water reservoir and which is communicated with the water inlet opening of the rice field via the reflux pump.