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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!