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Guangzhou Used Water Treatment Lean Management System

I.Project Introduction

The project would like to realize following targets:

Digitization and management of all drainage planning data.

Set up lean management system for checking and approving construction of public drainage facilities.

Based on Dong Hao Yong drainage basin shallow water layer drainage system, together with hydraulic modeling, current condition and planning data analysis, as well as existing hydraulic data from existing projects, improve efficiency and accuracy of checking and approving construction of public drainage facilities with auto-generated comments on the inquiries of drainage facilities

The project comprises digitization of drainage system facilities, digitization of planning data, drainage modeling analysis, lean approval on drainage design inquiries and data management system.

II.System Structure

The overall architecture of public drainage facilities design inquiries lean management system could be summarized as “supported by standard, constructed by five layers”. Out of which, the standard refers to the standards of planning, operation management and safety management would be maintained throughout the entire construction process of the public drainage facilities design inquiries lean management system. It would ensure the physical safety and data safety of all sub information systems of the drainage management. Also, it needs to ensure the flexibility, expandability and maintainability. Five layers refers to infrastructure layer, data layer, supporting layer, application layer and portal layer.

III. Functionality

3.1 Setup of drainage modeling analysis system

3.1.1 Pre-arrangement of modeling data on catchment area partition, catchment area revision and pre-arrangement of drainage pipeline network data.

Partition of catchment areas

Based on the underground characteristics, the layout of underground pipeline networks and river flow, as well as used water treatment location, partition the catchment using progressive method. The basic principle could be defined in 5 steps: 1. partition by river area, 2. partition by servicing area of used water treatment plants, 3. partition by landform, 4. partition by pipeline servicing areas, 5. partition by catchment area.

Revision of catchment areas

After basic partition, revise the catchment areas with additional information of permeable surface layer and underground pipeline networks.

Pre-arrangement of data

Pre-arrange and re-format current existing drainage pipeline networks modeling.

3.1.2 Initial setting of modeling data

Critical value management

Input or revise critical value of pumps or gates on/off switch based on canals and rivers water level.

Rainfall data management

Input or revise historical rainfall data, manage real time rainfall monitoring data.

Other parameters management

Input or revise general city runoff parameters, each underlying surface runoff parameters and roughness parameters of drainage pipelines.

3.1.3 Modeling

Compare modeling calculation result and real time monitoring data to calibrate current modeling parameters.

Analyze output: modeling output for future use.

Calibrate modeling: improve current modeling accuracy.

3.1.4 Model analysis

Conduct modeling analysis on rainfall condition, overflowing condition in pipelines and water level in canals and rivers with data input of pipeline width, flow rate, canal water level, running condition of pumps and gates.

Calculation of water flow rate of drainage units

Evaluate the ability of new drainage units with pipeline width and flow rate.

Analysis of overflowing condition at pipeline joints

Visualize the flow direction, pipeline depth and connecting condition of drainage pipeline joints.

-Analysis of drainage pipeline load

Analyze and evaluate whether current pipeline can takes more load. If positive, calculate location and amount of new pipeline joints. If negative, review the location and amount of new joints and re-calculate.

3.2 Lean approval on drainage design inquiries and data management system.

3.2.1 Standard operation procedure revision

Based on hydraulic modeling analysis, simplify and arrange inquiries operation flow map in Phase 1 and Phase 2 of drainage facilities management system to realize visualized operation.

3.2.2 Locating projects

Drainage users can apply in digital forms and locating projects on online maps.

3.2.3 Connecting into surrounding pipelines

After being verified by person, the system can auto determine whether it could be connected to surrounding pipeline networks by analysing the condition of surrounding pipelines. If positive, the system will determine the pipeline and location the new pipeline will be connected to.

3.2.4 Overflow condition analysis of pipeline joints

Determine the best joints location by conduct analysis of overflow condition of upstream and downstream of the joint.

3.2.5 Auto-generate feedback

Based on all analysis, the system will auto-generate feedbacks to inquiries.

3.3 Data management system

3.3.1 Statistics by drainage flood prevention facilities area

Conduct statistics of amount and specifications of drainage facilities in each districts.

3.3.2 Statistics by the fault of drainage facilities

Conduct statistics of fault conditions of drainage facilities like slope grades, mixture of rainfall and used water, as well as reverse siphon.

3.3.3 Stagnant water

Analyze stagnant water condition of flood-prone areas and rainfall impact on the drainage system with water level data, flow rate data and water quality data of dry and rain season.

3.3.4 Operation performance analysis

Analyze operation performance of drainage and flood prevention system by cities/districts, including operation maximum loading condition of facilities, amount and location of flood-prone areas under different rainfall condition.

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