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Table 9

Suggestions of experts and their roles for indicators selection after the first Delphi round

ParametersSuggestionsDiscussions
Economic
Resource 
1. Delete indicator 1.
2. Add ‘the development level of urban district’. 
As a support to delete indicator 1. 
Information and Skills 1. Delete indicators 6, 7.
2. Pay attention to the education of the public on daily protection of drainage systems and the emergency treatment for flood danger;
3. Reflect the application and advance of information management system. 
As a support to delete indicators 7, 8.
The role of information and knowledge should consider both the professionals in drainage field and the public who suffer from disaster. 
Technology 1. Delete indicators 10, 13.
2. Integrate indicator 14 into Economy Resource.
3. Focus on the capacity of the employees in urban drainage systems;
4. Focus on the degree of concordance between the competent departments of drainage system and water affairs in cities. 
As a support to delete indicators 10, 13.
Technical indicators should focus on technical reserves and practical experience 
Infrastructure 1. Delete indicator 16.
2. Modify indicator 19 into ‘the volume of retention facilities per capita in each urban city’.
3. Focus on the quality of the old drainage pipe network in the city;
4. Represents the resilience of urban housing, roads, energy and other infrastructures, such as the proportion of vegetation area and drainage facilities; 
As a support to delete indicator 16.
Infrastructure indicators should reflect the interaction of natural and artificial infrastructures. 
Institutions 1. Focus on contingency plan to heavy rainfall and its implementation efficiency
2. Reflect the effects of urban and municipal special planning. 
Contingency plan is crucial for the management and disposal for heavy rainfall events 
ParametersSuggestionsDiscussions
Economic
Resource 
1. Delete indicator 1.
2. Add ‘the development level of urban district’. 
As a support to delete indicator 1. 
Information and Skills 1. Delete indicators 6, 7.
2. Pay attention to the education of the public on daily protection of drainage systems and the emergency treatment for flood danger;
3. Reflect the application and advance of information management system. 
As a support to delete indicators 7, 8.
The role of information and knowledge should consider both the professionals in drainage field and the public who suffer from disaster. 
Technology 1. Delete indicators 10, 13.
2. Integrate indicator 14 into Economy Resource.
3. Focus on the capacity of the employees in urban drainage systems;
4. Focus on the degree of concordance between the competent departments of drainage system and water affairs in cities. 
As a support to delete indicators 10, 13.
Technical indicators should focus on technical reserves and practical experience 
Infrastructure 1. Delete indicator 16.
2. Modify indicator 19 into ‘the volume of retention facilities per capita in each urban city’.
3. Focus on the quality of the old drainage pipe network in the city;
4. Represents the resilience of urban housing, roads, energy and other infrastructures, such as the proportion of vegetation area and drainage facilities; 
As a support to delete indicator 16.
Infrastructure indicators should reflect the interaction of natural and artificial infrastructures. 
Institutions 1. Focus on contingency plan to heavy rainfall and its implementation efficiency
2. Reflect the effects of urban and municipal special planning. 
Contingency plan is crucial for the management and disposal for heavy rainfall events 
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