Water environment health of BeijingWater environment health of Beijing       

water resources and water  water resources and water  resource planning in Chinaresource planning in China

  

　　　

Liu Jingling

School of Environ.

Beijing Normal Uni.

9.19-2008

Water resources management in China

Overview of Beijing

Water environment problem diagnosis of Beijing

Health assessment of ecosystem

Scheduling solution of  water quantity and water

quality

Main content

Top seven river basins in China

The Yangtze river, the Yellow River, the haihe river,

huai river, the pearl river, the songhua river and liaohe

★

Haihe reiver basin

Beijing

Beijing City

+10 districts:

Yanqing

Huairou

Miyun

Pinggu

Sunyi

Changping

Tongzhou

Daxing

Fangshan

Mentougou

Beijing area:39°56′degrees north ， 116°20′degrees east , area:

16807.8km2

Population:4,201 thousand in 1949, increase to 14,927 thousand

in 2007。

Research regions-- water system within Beijing inner city

Research regions-- water system within Beijing inner city

The research regions are divided into five rivers and one lake.

Five rivers: Kunyu section of Jingmi; approach channel of

Yongding river; north moat

River: river of inner city; Liang Ma river

One lake: six sea, lakes.

The history change of river and lake system in inner cityThe history change of river and lake system in inner city

The physical-geographical conditions of research regions

The average annual precipitation in research regions is 562mm,mainly in June-September. The amount of evaporation is 1833mm.

1982 1984 1986 1988 1990 1992 1994 1996 1998 2000300

400

500

600

700

800

900

1000

mm

降雨

量

年代

0

20

40

60

80

100

120

mm

)降水量（

1 2 3 4 5 6 7 8 9 10 11 12

月份

The population of research regions increase by 22% from 1992 to 2001.

120

125

130

135

140

145

人口（万人）

年代92 93 94 96 97 98 99 2000 2001

Population exchange of research regions

Research significanceResearch significance

Important symbol of ancient capital, Beijing and human landscape, Important symbol of ancient capital, Beijing and human landscape, it contains the water culture of Six Dynasties and ancient capital.it contains the water culture of Six Dynasties and ancient capital.

Material, energy cycle and information Material, energy cycle and information

transmission center of city water systemtransmission center of city water system

The perquisite and guarantee of The perquisite and guarantee of

ecology Beijing and Green Olympicsecology Beijing and Green Olympics

The key points of improving the The key points of improving the

water environment quality of Beijingwater environment quality of Beijing

Theoretical basis

Ecological system

Health theory

Ecological system

Health theory

Ecological system

Management theory

Ecological system

Management theory

Ecological environmentWater requirement theoryEcological environmentWater requirement theoryUnion

scheduling

technology

Union

scheduling

technology

Management methods of ecosystem

monitoring of

the hydrolog, water quality

and ecological conditionsof

rivers and lakes

monitoring of

the hydrolog, water quality

and ecological conditionsof

rivers and lakes

scheduling solution of developing evaluation selection

scheduling solution of developing evaluation selection

evaluation

evaluation

evaluationscheduling

objectives evaluation

Prediction of pressure and

river-lake ecosystem

changes

Prediction of pressure and

river-lake ecosystem

changes

diagnosis (pressure,

risk)

diagnosis (pressure,

risk)

Basic principles The integrity of watershed

Starts from the integrity of watershed, it is suitable for the total

resource amount of watershed

Integrity of ecology

We should pay attention to the completeness of ecological

structure and function, guarantee the minimal ecological

Environment water demand and ecology base flow amount.

High-efficiency of allocation

Choosing the best water amount allocation, using more

reasonable control of water source, realizing the optimization of

economy, society and environment effect.

Base year and target yearBase year and target year

Choosing the successive monitoring data over 3 years of

water resource department from 1999 to 2002, properly

refer to the historical system data and use year of 2002 as

the current state year.

According to the water resource plan in the 21st century of

Beijing, respectively establishing the target of recent year,

mid-term and future is 2010, 2020 and 2030.

The key target year is 2010, because of the host of

Olympics in 2008, secondly is the delay effect of ecological

environment recovery, it is the perquisite and condition of

realizing the sustainable management of water resource.

Technical route

Pollution control technology

Pollution control technology

Water restoration technology

Water restoration technology

Ecology restoration technology

Ecology restoration technology

United scheduling plan of waster system, water amount, and water quality in Beihuan of Beijing

Integrity of watershedIntegrity of watershed

Integrity of ecology

Integrity of ecology

High-efficiency of allocation

High-efficiency of allocation

Integrated technology of flow rate

Integrated technology of flow rate

Water system health evaluation technology in Beihuan of Beijing

Timeliness of measure

Timeliness of measure

Healthy ecosystem Healthy ecosystem ecosystem demands water

ecosystem demands water

ecosystem management ecosystem

management

decision sup

portting

system

Ecology environment problem diagnosis of research regions

Find out the key element causes ecology degradation, and provides breakthrough to improve current state of environment.

Problems of urban water environment

Problems of urban water environment

HydrologHydrolog

Water qualityWater quality

Aquatic eco-systemAquatic eco-system

BioindicatorBioindicator

Physical and chemical indexPhysical and chemical index

The quantity of water The quantity of water

Water levelWater level

The velocity of flow

The velocity of flow

StructureStructure

Function Function

Physical structure Physical structure

Biological structure

Biological structure

Environment function Environment function

Social function Social function

Six sea ,lakes

1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004

500

600

700

800

900

1000

1100

1200

1300

m3水量（

万）

年份

最 小生态需水量

蒸发 渗漏水量

The water amount is 5440,000

m3 in 2002

The overall water change

period of 6 sea

P=95 ％， T=1208 days

Because it is low water year,

the water amount can only

maintain the evaporation and

leakage of lake surface, it can

not change water, year of level

water, it can change water for

three times.

The water quality in research regions

表 2-2 2002年全年平均水质状况统计（m）

河系 站 名 DO CODMn 氨氮 总磷 总氮

三家店 9.6 4.2 0.11 0.025 1.23

高井 9.1 4.3 0.32 0.043 1.18

永引水渠

罗道庄 7.7 5.1 0.66 0.197 1.92

松林闸 6.4 5.9 1.30 0.287 2.43 北护城河

亮马河 106. 3 15.8 1.600 24.00

西海 12.0 8.6 0.81 0.209 1.58

后海 11.0 9.2 0.39 0.193 0.934

前海 8.8 8.0 0.39 0.190 0.803

北海 9.0 6.2 0.31 0.109 0.535

中海 10.0 6.3 0.28 0.057 0.413

六海

南海 11.0 6.8 0.35 0.049 0.584

内城河系 筒子河 10.4 7.5 0.31 0.074 0.543

Spatial variation of water quality in research regions

Water quality change of the approach channel of Jingmi

00. 050. 1

0. 150. 2

0. 250. 3

0. 35

团城湖

八里庄

麦钟桥

松林闸

西海

后海

前海

北海

中南海

中海

南海

简子河

湖泊

TP m

g/l

总磷 四类 五类

00. 5

11. 5

22. 5

3

团城湖

八里庄

麦钟桥

松林闸

西海

后海

前海

北海

中南海

中海

南海

筒子河

湖泊

TN m

g/l

总氮 三类 四类

Eutrophication state in research regions

1 10 100 10001

10

100

Chla

(ug/

l)

TP ug/ l（ ）

贫营养 中营养 富营养 超营养

西 海

后海

松林闸前 海

罗道庄

中入

筒子 河

中海南海

高井三家店

麦钟桥团城湖

北 海

mild nutrient ：

Tuancheng Lake,

Maizhong

bridge,Sanjiadian

rich nutrient ：

Gaojing, south

sea, middle sea,

Tongzi river

excessive nutrient

： entrance of

middle

sea， west sea,

qian sea, hou

sea,north

sea,Songlingzha,

luodaozhang,Lia

ngma river

The formationThe formation of water bloomwater bloom

Space structure of waterSpace structure of water

Stream

segment

River bank

and section

Riverbed and features of side

slope

buffer strip of river bank

Jingmi

approach

channel Kunyu

section

Barnacle

bank， double

fracture surface

Upstream riverbed depth is 0.6

ｍ， width is 2m， deep

riverbed depth is 1.85m；

parameter of side slope is： 0

buffer strip of river bank： west

bank is 3.5m

Approach

channel of

Yongding River

Barnacle

bank， ladder-

shaped fracture

surface

Parameter of side slope is ：

2.5

Both sides are close to cement

road

Nanchang

River

Barnacle

bank， double

fracture surface

Parameter of side slope is：

2.0

Zizhu Park and riverbank reaches

30-40m， buffer strip downstream

of Zizhu Park is 2-3m， the

penetration bank surface

North

Hucheng River

Barnacle

bank

Parameter of side slope is： 0 buffer strip of green belt is 3-5m

， some riverbed has no green belt

in Liangma Section

River system

of inner city

Barnacle

bank

Parameter of side slope is： 0 Without buffer strip

Hardening of river bank / lining

Landscape effect

River section Greening plants Width of green

belt

Effect of landscape

Jingmi

approach channel

Chinese white

poplar, lawn

3.5-8.6m The variety of plant

is bald

Approach

channel of Yong

Ding River

Willow, Chinese

white poplar, sward

2.5m Distribution of tree

is thin

Nan Chang

River

Poplar, pine tree,

plant

tabernaemontani

bulrush

  Effect of landscape

is good

Noth Hu

Cheng River

Little greening   Rubbish is piled

casually and

landscape effect is

bad

““ Landscape effect and purification function

Water environment Water environment  pollution

Carrying capacity of point source pollutionCarrying capacity of point source pollution

表 2-11: 入城市河流废水量估算

废水量(104t/a) COD (t/a) TN(T/a) TP(t/a) 京密引水渠昆玉河 15.5 17.8 3.00 0.60

南长河 5.8 15.6 2.50 0.50 北护城河 7.2 19.2 7.52 1.92

六海 0 0 0 0 永定河引水渠 42.4 151.9 4.90 0.48

合计 70.9 204.5 17.92 3.48

Carrying capacity of Carrying capacity of area source pollution

表 2-5各分区降雨径流污染物负荷

分区 流域面积

(km2)

缓冲带情况 TN

(t/a)

TP

(t/a)

京密昆玉段 23.9 0.9 2.35 0.96

永引 52 1 5.69 2.33

南长河 9 0.8 0.79 0.32

北护城河 19.5 0.9 1.92 0.79

六海 0.00 0.00

筒子河 16.7 1 1.83 0.75

合计 12.57 5.15

Carrying capacity of internal pollution Carrying capacity of internal pollution sourcessources

P content of most points is at 1g/kg level, N content in bottom mud

is at 0.5g/kg level.

表 2-6 底泥中 C、N、P的含量(克/kg)

6月 7月 采样点 C N P C N P

颐和园 2.660 0.333 0.476 1.719 0.148 0.445 动物园 8.217 0.583 1.446 西海 7.441 0.560 0.8893 8.204 0.493 1.317 后海 7.267 0.553 0.750 7.091 0.424 1.009 前海 7.992 0.44 1.106 北海 6.842 0.533 0.797 6.469 0.425 1.084

ProportionProportion of pollutant sourcepollutant source

TN TP0

10

20

30

40

50

60

百分比

污染 物

面源 点 源

12.57T/a

5.15T/a17.92T/a

3.48T/a

Problem analysis of research regions

表 2-7研究分区水环境问题类型

水文 水质 水生态系统 胁迫因素 分区

水量 水位 流速 理化 生物 生物 结构

物理 结构

景观 效果

点源 面源

问题类型

昆玉段 ● ● ● ● ● ● ● ● ● ● 生态型

永引渠 ● ● ● ● ● ● ● ● ● ● 水质型

南长河 ● ● ● ● ● ● ● ● ● ● 清洁型

北护城河 ● ● ● ● ● ● ● ● ● ● 量质型

内城河 ● ● ● ● ● ● ● ● ● ● 水力型

六海 ● ● ● ● ● ● ● ● ● ● 水质型

注：表中以红、黄、绿灯表示各因子的不健康，亚健康，健康三种程度。

Sluice gateSluice gate -manual scheduling

Analysis on the problemsAnalysis on the problems of research regions

Broken of water system physical structureBroken of water system physical structure

Rebuilding of some river and lake project cut off the river

and lake system, reduces the water square of cit and

lowers the strain capacity of water draining.

Rebuilding of some water conservancy projects have Rebuilding of some water conservancy projects have

certain effect on the original water cycling, results in the certain effect on the original water cycling, results in the

bad flow ability of inner Jinshui Rive, even becomes dead bad flow ability of inner Jinshui Rive, even becomes dead

waterwater

River and lake are basically use the concrete to do lining, River and lake are basically use the concrete to do lining,

which reduces the landscape effect of river and lake, which reduces the landscape effect of river and lake,

further lowers the ecological effect of city river.further lowers the ecological effect of city river.

Interest conflicts between departments

Economic interests and ecological value of tourism

Water quality and conflict between water quantity

management departments

Management ability of urban water environment

Sewage management

Technical means + public participation

Analysis onAnalysis on management issuesmanagement issues of water environmentwater environment

The improvement of public participation

The result of questionnaire shows:

The water quality of public water environment andThe water quality of public water environment and

landscape requirement is more and more high; it is notlandscape requirement is more and more high; it is not

clear abut the environmental protection and channel ofclear abut the environmental protection and channel of

participation.participation.

49 ％ Thinking that the water quality of Beijing needs

further improvement

95.9

％

Thinking that tourism place choice should

consider water environment

61.2

％

Choosing water landscape house of higher price

32.7

％

Thinking that the biggest problems of water

system is severe artificialization

53.1

％

Paying attention to water pollution

87.8

％

Are planning or reusing water

Ecosystem health evaluation of research regions

T

arg

et

lev

el

I

nde

x level

Element

level

Index level

Detailed index Calculation method and description

EcosystemHealth Degree ofCity river and lake

I

nde

x of Natural Envelopment

Hydrology

characteristic

Water amount storage/river and lake square(m)

Water supply

coefficient Supply amount/loss amount

Flow speed Flow amount /water square

Water

quality

Water quality 《 Environment and Quality Standard of Underground

Water 》（ GB3838-2002 ）

Water nutrient

condition TSIM nutrient state index

Pollution condition

of bottom Pollution index of bottom material P evaluate a)

Structure

and function

of water

ecosystem

Coverage rate of

hydrophytehydrophyte square/ river and lake square

Specie diversity benthic animal Shannon diversity index

The primary

productivity of

phytoplankton

0.28chla(μg/l)+0.96

Space

structure of

water

Fringe condition of

land and water F1=f(slope angle、 artificial swamp square )

Width of plant

buffer strip width(m)

S

ocia

lEnvironmentindex

Landscape

effect

Value for visit and

recreation

F2=f(natural landscape, human landscape and number of

tourists)

Environment

satisfaction ratio of

public

Satisfied people number/total people of survey

Intimidatio

n factor

The minimum

water demand

guarantee ratio

Storage amount of current state/minimum ecology water

demand amount

Sludge disposal

ratio Sludge disposal amount/ discharge amount

Pollution intensity

of surface source

Average rain and run-off amount×pollutant density/storage

amount of river and lake (mg/l)

Six sea ecosystem health evaluation index and standard Detailed index Unit Health critical state Unhealthy

Water depth m ≥1.6 1.2～ 1.6 ≤1.2

Supply index of river and

lake — ≥1 0.5～ 1 ≤ 0.5

Flow speed m/s ≥0.04 0.02～ 0.04 ≤0.02

Water quality — Ⅲtyp Ⅳtype Ⅴtype or inferior to typeⅤ

Water nutrient condition — TSIM index≤37 38～ 53 ≥54

Coverage percentage of

water plant% ≥60 30～ 60 ≤30

Diversity of benthic

animal — ≥2 1～ 2 0～ 1

The primary productivity

of phytoplankton

gO2/

m2.d≤2.5 2.5～ 7.5 7.5～ 14

Fringe condition of land

and water —

Slope angle≤30º ， artificial swamp≥70%

Slope angle30º

～ 45º， artificial

swamp 50%～

70%

Slope angle 45º～

90º， artificial swamp≤50%

Width of plant buffer

strip m ≥10 5～ 10 ≤5

Value for visit and

recreation Point ≥90 70～ 90 ≤70

Environment satisfaction

ratio of public% ≥70 50～ 70 ≤50

The minimum water

demand guarantee ratio% ≥90 70～ 90 ≤70

Sludge disposal ratio % ≥70 60～ 70 ≤60

The healthhealth evaluating method of the ecological systemevaluating method of the ecological system

Evaluating model of healthEvaluating model of health

Of which, A is the ecological system health degree of Of which, A is the ecological system health degree of

city river and lake. W is the weight matrix of naturecity river and lake. W is the weight matrix of nature

environment index and social environment index forenvironment index and social environment index for

each heath standard.each heath standard.

A W B

1.1.2 1.1.2 The healthhealth evaluating method of the river evaluating method of the river ecological system in Beijing Beihuanecological system in Beijing Beihuan

Targe

t levelIndex level

Element level

Detailed index Calculation method and description

Ecos

ystem

Health

of city

river

system

Hydrology

characteristic

Water amount storage/river and lake square(m)

Water supply coefficient Supply amount/loss amount

Flow speedRiver: Gate caused the variation of river flow

speed

Water

environment

quality

groundwater quality《 Environment and Quality Standard of

Underground Water 》（ GB3838-2002 ）

Water nutrient condition TSIM nutrient state index

Pollution condition of

bottomPollution index of bottom material P

Structure and

function of

water

ecosystem

Coverage rate of

hydrophytehydrophyte square/ river and lake square

Specie diversity benthic animal Shannon diversity index

The primary

productivity of

phytoplankton

0.28chla(μg/l)+0.96

Space

structure of

water

Fringe condition of land

and waterecological embankment propotion

Width of plant buffer

stripwidth(m)

Landscape

effect

Value for visit and

recreation

F1=f(natural landscape, human landscape and

number of tourists)

Environment satisfaction

ratio of publicSatisfied people number/total people of survey

Intimidation

factor

The minimum water

demand guarantee ratio

Storage amount of current state/minimum

ecology water demand amount

Sludge disposal ratio Sludge disposal amount/ discharge amount

Pollution intensity of

surface source

pollutant burden of urban rainfall-runoff /waste

load allocation

（（ 11 ）） Evaluation indexEvaluation index and standard （（ tabletable 1- 1-33 ））

Detailed index Unit Health critical state Unhealthy

Water amount

river— 0.7～ 1 0.5～ 0.7 0～ 0.5

Lake — ≥1.6 1.2～ 1.6 ≤ 1.2

Supply index of

river and lake— ≥1 0.5～ 1 ≤ 0.5

River:Gate caused

the variation of river

flow speed

— ≤20 20～ 50 ≥50

Lake： flow spedd m/s ≥0.04 0.02～ 0.04 ≤ 0.02

groundwater

quality— ≤ Ⅲ type Ⅳ type

Ⅴtype or inferior to

type Ⅴ

Water nutrient

condition—

TSIM

index≤37 38～ 53 ≥54

Coverage

percentage of water

plantRiver

% 30 10～ 30 ≤10 or>30

Lake % 60 30 ～ 60 ≤30 or>60

Diversity of

benthic animal— ≥2 1～ 2 0～ 1

The primary

productivity of

phytoplankton

gO2/m2.d ≤2.5 2.5～ 7.5 7.5～ 14

Fringe condition of

land and water — ≥70 50～ 70 ≤50

Width of plant

buffer stripm ≥10 5～ 10 ≤5

Value for visit and

recreation分 90 ～ 100 70～ 90 ≤70

Environment

satisfaction ratio of

public

% ≥70 50～ 70 ≤50

minimum water

demand guarantee

ratio

% ≥90 70～ 90 ≤70

Sludge disposal

ratio% ≥70 60～ 70 ≤60

Pollution intensity

of surface source— ≤30 30～ 50 ≥50

（（ 22 ）） The result of The result of health evaluationhealth evaluation

Table 1-4 The healthhealth evaluating result of river and lake ecological system in beihuanevaluating result of river and lake ecological system in beihuan

River system and stream segment

Healthy  Critical state Unhealthy State

Approach channel of Yongding river

0.327 0.253 0.420unhealthy

Kunyu section of Jingmi approach

channel 0.357 0.312 0.331

Healthy

Nanchang river 0.377 0.293 0.330 Healthy

North moat 0.098 0.082 0.820 unhealthy

Tongzi river 0.135 0.362 0.503 unhealthy

Liangma river 0.042 0.112 0.846 unhealthy

Six sea

West sea 0.097 0.125 0.778 unhealthy

Hou sea 0.154 0.104 0.742 unhealthy

Qian sea 0.103 0.155 0.742 unhealthy

North sea 0.127 0.090 0.783 unhealthy

Middle sea 0.188 0.402 0.410  critical state

South sea 0.277 0.315 0.408 Healthy

0.00

0.20

0.40

0.60

0.80

1.00

永定河引水渠

京密引水渠南长河

北护城河亮马河

筒子河

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

永定河引水渠

京密引水渠南长河

北护城河亮马河

筒子河

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

永定河引水渠

京密引水渠南长河

北护城河亮马河

筒子河

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

永定河引水渠

京密引水渠南长河

北护城河亮马河

筒子河

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

永定河引水渠

京密引水渠南长河

北护城河亮马河

筒子河

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

永定河引水渠

京密引水渠南长河

北护城河亮马河

筒子河

隶属度

不健康 临界状态 健康

hydrologic

al

characteristic

s water

resources

quality

function and

construction of

aquatic

ecosystem

spatial structure

of waterside

landscape

effect

Intimidation

factor

0.00

0.20

0.40

0.60

0.80

1.00

西海 后海 前海 北海 中海 南海

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

西海 后海 前海 北海 中海 南海

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

西海 后海 前海 北海 中海 南海

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

西海 后海 前海 北海 中海 南海

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

西海 后海 前海 北海 中海 南海

隶属度

不健康 临界状态 健康

0.00

0.20

0.40

0.60

0.80

1.00

西海 后海 前海 北海 中海 南海

隶属度

不健康 临界状态 健康

hydrologica

l

characteristics

water

resources

quality

function and

construction of

aquatic

ecosystem

spatial structure

of waterside

landscape

effect

Intimidation

factor

Water quality

Ecotype

Water quality

Ecotype

Pollution control areaPollution control area

EcotypeEcotype

Ecological restoration area Ecological restoration area

Quantity and quality

Ecotype

Quantity and quality

Ecotype

Synthesis improvement areaSynthesis improvement area

Approach

channel

of Yongding

river

Approach

channel

of Yongding

river

Tongzi

river

Tongzi

river

Jingmi approach

channel

Jingmi approach

channel Nanchang

river

Nanchang

river

Middle

sea

Middle

sea

South

sea

South

sea

North

moat

North

moat

Liangma

river

Liangma

river

West sea

Hou sea

West sea

Hou sea

Qian sea

North sea

Qian sea

North sea

（（ 44 ）） DDiagnosis and reasons analyzes of the ecological iagnosis and reasons analyzes of the ecological environment problemenvironment problem

Figure 1-1 The schemes of urban river and water functional

partition in Beijing

The construction of united dispatch scene

model of water quality and water quantity

water quantity

of current state

South-to-

North water

diversion

reclaimed

water recycling

the lowest

water quality

the most

excellent water

quality

the most

suitable water

quality

wet season drought

period

mean water

period

pollution

control area

demonstration

area

recovery area

Evaluation and optimization of united

dispatch scene plan

gate regulation

and control model

water transfer

duration

flow rate/flow

quantity

water level

change

Opening

conclusion

and

countermeasure

Figure 2-12 Technology route of gate

2.3.22.3.2 Type and Type and classificationclassification of sluice gate in research regions

Sluice gate state in Sluice gate state in research regions (40 sluice gates for each (40 sluice gates for each

type) type)

The shortage of the methods is as follows:The shortage of the methods is as follows:

Using water retaining and flood draining as the main target, Using water retaining and flood draining as the main target,

considering little on ecological health.considering little on ecological health.

Breaks off the river and lake system of city to some extent.Breaks off the river and lake system of city to some extent.

Mainly adopts the single regulate and control model of average Mainly adopts the single regulate and control model of average

water supply, consider little on the time and space change , water supply, consider little on the time and space change ,

requirement of water and lake ecological water demand.requirement of water and lake ecological water demand.

４ ４ ConclusionConclusion

River section of Beihuan water system all has ecology environment problems of different degree ：

Kunyu section of Jingmi approach channel, Nanchang river ,Middle sea and South sea——Ecotype

Yongyin channel ,Tongzi river,Qian four sea —— Water quality and ecotype

North moat and Liangma river—— Water quantity and quality and ecotype

The diagnosis of ecology environment problems of each water section and function area division ：

Yongyin approach channel and Tongzi river——Pollution control zone ；

Kunyu section of Jingmi approach channel, Nanchang river and south-central sea ——Ecological restoration zone；

North moat ,Liangma river and six sea （ except south-central sea ）—— Synthesis improvement zone

４ ４ ConclusionConclusion Alarm range water bloom division ：

The density of chlorophyll A: alarm grade above 0.06 mg/L is green.

The density of chlorophyll A between 0.06-0.10 mg/L, the alarm grade is yellow.

The density of chlorophyll A above 0.10 mg/L, the alarm grade is red

It adopts classification study, area division and grade dispatch for the water system gate of Beihuan

It divides the main control gate of study area into three kinds:

It studies 17 main gates of study area, it is divided into two grade:

The first grade gate includes 7 gates such as Changhe gate, Songlin gate and so on.

The second gate includes 10 gates such as Beigui gate and so on.

Introduces the function area division of city water Introduces the function area division of city water and lake.and lake.

Strictly control source pollution of point, source Strictly control source pollution of point, source and surface.and surface.

Recover and rebuild ecological system structure.Recover and rebuild ecological system structure. Combine landscape construction with Combine landscape construction with

environmental benefitsenvironmental benefits

５　５　 SuggestionSuggestion 　　

The aspect of planning

５　５　 SuggestionSuggestion

According to the health diagnosis of water system, adopts different control plan and gradually recovers ecological system health.

The optimization of water pollution disposal technology, water amount adjustment and ecological system recovery.

Constructing and managing the emergency support system, provide basis for water utilities and water environment management department.

Technology optimization

５　５　 SuggestionSuggestion

Definite the principle of ecology superiority and multi- Definite the principle of ecology superiority and multi- target of water resource management.target of water resource management.

Well coordinate water quality and water amount, water-Well coordinate water quality and water amount, water-saving keep peace with pollution control.saving keep peace with pollution control.

Forbidden using washing powder containing P, reducing Forbidden using washing powder containing P, reducing the nutrient load of water.the nutrient load of water.

Enables public to particulate in the whole process in water Enables public to particulate in the whole process in water resource management.resource management.

Reasonable planning and managing landscape of city water Reasonable planning and managing landscape of city water system.system.

Public participation

ThankThank your attention!your attention!