BaoCao kyoto 21 07 08 eng 2

Các quá trình về xử lý bằng đất Tưới nước: Tưới bằng nước thải, quá trình xử lý bằng đất được áp dụng phổ biến nhất hiện nay, bao gồm việc tưới nước thải vào đất và để đáp ứng các yêu cầu sinh trưởng của cây cối. Dòng nước thải khi đi vào đất sẽ được xử lý bằng những quá trình vật lý, hoá học và sinh học. Dòng nước thải đó có thể dùng tưới cho các loại cây bằng cách phun mưa hoặc bằng các kỹ thuật tưới bề mặt như là làm ngập nước hay tưới theo rãnh, luống. Có thể tưới cho cây trồng với tốc độ tiêu thụ từ 2,5 7,5 cm tuần. Thấm nhanh vào đất : Theo phương pháp này, dòng nước thải được đưa vào đất với tốc độ lớn (10 210 cm tuần) bằng cách rải đều trong các bồn chứa hoặc phun mưa. Việc xử lý xảy ra khi nước chảy qua nền đất (đất dưới mặt) ở những nơi mà nước ngầm có thể dùng để đảo ngược lại gradient thủy lực và bảo vệ nước ngầm hiện có ở những nơi chất lượng nước ngầm không đáp ứng với chất lượng mong đợi nước được phục hồi quay trở lại bằng cách dùng bơm để hút nước đi, hoặc là những đường tiêu nước dưới mặt đất, hoặc tiêu nước tự nhiên.

• DEPARTMENT OF ENVIRONMENT, DANANG UNIVERITY OF TECHNOLOGY

• GRADUATE SCHOOL OF GLOBAL ENVIRONMENTAL STUDIES, KYOTO UNIVERSITY

ENVIRONMENTAL MANAGEMENT BASED ON

COMMUNITY’S ACTIVITIES:

A CASE STUDY AT DAM RONG LAKE, THUAN PHUOC

WARD, DANANG CITY, VIETNAM

Dr Tran Van Quang Department of Envinronment

Danang University of Technology Danang University

1 STUDYING SITE:

Dam Rong Lake, Thuan Phuoc Ward, Danang City

Hanoi

Ho Chi Minh City

(1 STUDYING SITE: cont.)

Square: 1,259 km 2

Population: 752,493 people

Thuan Phuoc Ward

Square: 110haPopulation: 16,570Average Income: 600-700$

Âu thuyền Kênh thoát nước

Hồ Đầm Rong

Dock Canal

Dam Rong lake

(1 STUDYING SITE: cont.)

Dam Rong Lake

The role of the lake:

- Rain water regulation

- A landscape of the

City

2 INTRODUCTION

• DEPARTMENT OF ENVIRONMENT, DANANG UNIVERITY OF TECHNOLOGY

• GRADUATE SCHOOL OF GLOBAL ENVIRONMENTAL STUDIES, KYOTO UNIVERSITY

2.1 Problems of Dam Rong Lake

- Water is polluted by organic matters, nitrogen

- Air is polluted by bad smell from the lake all year round

(2 INTRODUCTION: cont.)

• DEPARTMENT OF ENVIRONMENT, DANANG UNIVERITY OF TECHNOLOGY

• GRADUATE SCHOOL OF GLOBAL ENVIRONMENTAL STUDIES, KYOTO UNIVERSITY

2 2 The reasons

- Non-treatment drainage without treatment flows directly

in to the lakes It causes bad smell, especially, in dry season

- Solid Wastes from the households around the lake (nylon bags, organic waste etc)

(2.3 INTRODUCTION: cont.)

2.3 Suggested Solutions

- Build new sewerage system to collect drainage

- Collect bottom mud

⇒both of the solutions are not available (do not have budget) and low effect

- Or some people even said that we should fill in this lake (the important role of the lake is rain water storaged)

- Flow water hyacinth They have done but mosquito appear to much

The problems of the lake has not been solved yet.

• Department of Enviroment, Danag University of Technology

• Graduate Scool of Global Enviromental Studies, Kyoto University

 Khoa Môi trường

Trường Đại học Bách khoa

 Trường Tiểu học Võ Thị Sáu

 UBND Phường Thuận Phước

 Department of Natural Resource and Environment

3.1 TARGET

1 LONG TERM TARGET

1 To plan a model of environmental management based local community

2 To find out a environmental technology method to

control and solve water polutted

3.2 DEVELOP SOLUTIONS

3.2.1 Call on local government’ supports and

Community’s cooperation: Discuss with local

government, meeting with the local community people

Local

government

Introduce and apply the environmental method to solve the problems of the lake

(Technique, operation)

Community

Control pollution

Scientific orgnizations

To learn well policies,

regulation, system etc

can be applied.

Develop some solutions

3.2 DEVELOP…: cont.)

3.2.3 Applying method

1 Environmental education: at Vo Thi Sau Primary School Through

activities: town watching, camping etc

2 Propaganda to raise up community awareness about environmental

issues (through public media, meeting etc) Develop some outside activities: waste collection, clean up the road, public area…

3 Apply eco-technology to reduce the polution of the lake

apply

3rd stepDevelop the sollutions

(3 3 REAL ACTIVITIES: cont.)

b At the Thuan Phuoc Ward

+ Collect community opinion.

Protection Board

+ Meeting and discussion to find

so some p the solution

+ Solid waste collection(every week tuần).

3.3.2 Science solution: Apply eco-technology

b Eco-technology methods:

1 Wet land filter system

2 Floating filter system

3 Increase the self-clean ability of eco-system

Notice: The pollution cannot be reduce if we do not apply eco-technology

solution

Wet land filter module

Floating filter module

Collect floating waste, mud (supply more oxygen for oxygenation process: self-clean ability)

3.4 RESULTS

3.4.1 Community awareness has been raised up

Community people attend to collect waste;

make net for solid waste collection…positively

3.4.2 Get the supports of local government

Provide budget to make fence around the lake and collect

bottom mud; have plan to build eco-park for community people

Hiện trạng môi trường ngày 16/2

3.4.3 Results after applied eco-technology

• Environment became

better

• Water quality is better

• Bring back economic

effective nesses (can

collect some kinds of

water insect (artemi) for

feeding fishes)

(3.4.3 The results: cont.)

Fishing

Collect Artemi

3.5 REMAINING PROBLEMS

1 Water quality

is still polluted (organic matters, nitrate etc.)floating mud from bottom mud (thick bottom mud)

driannage bring mud into the lake

2 Bad smell is remained in dry season

Because of organic waste is disintegrated

4 CONCLUSIONS AND SUGGESTIONS

4.1 CONCLUSION:

a The results from Environmental Education Acitvities:

- The awareness of the community about environmental

issues has been raised up For example:

- The citizens here do not throw gabbage in to the lake or public areas; they have arranged a couple day in a month to collect solid wastes, clean up the road, public areas in their ward

- The local government has developed some activities to

improve the environment of this ward

- The cooperation between government and the community has been established It would help to solve the

environmental problems here easier

• DEPARTMENT OF ENVIRONMENT, DANANG UNIVERITY OF TECHNOLOGY

• GRADUATE SCHOOL OF GLOBAL ENVIRONMENTAL STUDIES, KYOTO UNIVERSITY

(4 CONCLUTIONS AND SUGGESTIONS: cont.)

b.The results from applying Eco-Technology :

- This method (floating filter and wet land filter module) is suitalbe in order to control the pollution of the lake

Envinronment has been improved (water quality is better, ecosystem is recovered…)

4.2 SUGGESTIONS:

- It is very necessary to continue developed solutions

(environmental education and environmental technology method in larger areas)

• DEPARTMENT OF ENVIRONMENT, DANANG UNIVERITY OF TECHNOLOGY

• GRADUATE SCHOOL OF GLOBAL ENVIRONMENTAL STUDIES, KYOTO UNIVERSITY

(4.2 SUGGESTION:cont.)

- Supply boat, waste collection basket, basket for the

community

- Apply eco-technology solution in larger area:

- Find out more economical effects: ex: food for feeding fish (artemi)

- Find a fund for community activities…

- Cooperate with gorvernment organizations in infrastructure improment project

THANK YOU FOR YOUR ATTENTION

Thu thuÕ &

phÝ dÞch vô Qu¶n lý & VËn

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