2012 yellow river china.ppt

7/26/2019 2012 Yellow River China.ppt

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ACEDP Project: EnvironmentalFlows in The Lower Yellow River

Jiang Xiaohui

YRCC

Workshop, Beijing

2012 Feb 23


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Contents

Background

Genera en!iron"en#a $o% assess"en#

"e#hodoog&

Brie$ descrip#ion o$ %ork

'(perience and reco""enda#ions


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Sanmenxia

Xiaolangdi

Dam

N

Lake

City

Hydrological station

River

Lijin

Luokou

Aishan

Sunkou

Gaocun

Huayuankou

Dongping Lake

,

ai!eng

Lijin

"i#o

$ai an

Dongping

Liaocheng

%inyang

LuoyangSanmen&ia "heng'hou

(inan

)ur!e&

)i#e #hree

Study Area

ac!"round


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Lower Yellow River Flow #ssues

* +o#her Ri!er-

. /igh %a#er de"and. /igh degree o$ regua#ion

* Ci"a#e change and hu"an ac#i!i#ies. Fo%s reducing o!er pas# 0 &ears, cease #o $o% so"e#i"es

$ro" 10s #o 10s

* )edie"n#. !er& high sedi"en# oad #o #he o%er ri!er,$ood* Yeo% Ri!er 4e#a . a d&na"ic es#uarine Ra"sar %e#and

. 4epends on sedi"en# supp& $or gro%#h* Ri!erine %e#ands

. os#& disconnec#ed due #o $ood d&ke cons#ruc#ion* 5ua#ic ecos&s#e"

. os# di!ersi#&


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#n China there is a stron" awareness o$ the need and im%ortance o$

environmental $lows& Environmental $low assessments have 'een underta!en in

a num'er o$ rivers(


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'n!iron"en#a $o% "e#hods used in China6

* /&droogica778ennan#

* /&drauic ra#ing7We##ed peri"e#er "e#hod,

R2CR9)):Focus on one or a $e% ke& species;* /abi#a# si"ua#ion7


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)eneral environmental $low assessment


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rie$ descri%tion o$ wor!

Selectsites and reaches


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Field tri%sam%le wor!sho% and literature search


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*en"jin

wetlands

+hen",hou

wetlands -ai$en"

wetlands

Don"%in"

La!e

Delta

wetlands

River channelReaches

.

/

0

1


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#denti$yecolo"ical assets


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* A river asset is any attri'ute o$ the natural ecosystem o$

value to society& The value could 'e ecolo"ical( socialand2or economic&

* River assets include s%ecies( 'iolo"ical communities(

ha'itats and ecosystems o$ conservation im%ortance

3collectively re$erred to as 4conservation assets56&

River asset


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Assets in the low Yellow River

* Fish species, e>g> Yeo% Ri!er Carp* We#and !ege#a#ion

* Birds

* )pa%ning process

* )edi"en# #ranspor#

* Wa#er 5uai#&

* Geo"orphoog&


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Develo% conce%tual models inking asse# hea#h and $o% co"ponen#s

)eomor%holo"y( %lants( $ish( macroinverte'rates( water 7uality( 'irds8


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Flow regime

Low flows Flow pulses High flows

Maintain depth

of water inrefuge pools

Maintain

adult fish

population

Maintain larval

and

juvenile habitat in

river channel

Sediments from

upstream and

catchmentsincrease. and D

decreases

Maintain bac!water refuges

and food resources for fish.

Fish mortalit" increases.

Floods

Stimulate

spawning

Food resources

Figure> 8he inks be#%een indi!idua $o% co"ponen#s and $o% re5uire"en#s $or carp


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Objective Flowcomponent

Hydraulic criteria Timing

Maintain sufficient waterdepth in pools for largebodied fish

Low flow Max D !"# m$% &"!'&"( ms'!

)ov'Mar*+pril',une

-timulate spawning Flow pulse D% !'. m at pea/ of flowpulse"0nundated beach area* and

increase bac/ water$1&"2 ms'!

+pril ' ,une

3rovide new habitat andfeeding opportunities forfish

High flow +verage D &"4 m5$% &"2 ms'!'!ms'!

,uly'October

3rovide new habitat andfeeding opportunities forfish* but increasedsediment and low DO mayincrease mortality

Flood +verage D &"( m5$% &"# ms'!'!".ms'!

,uly'October

Ta'le& Flow com%onents and hydraulic criteria relevant to Yellow River Car% re7uirements&

D 9 de%th( 9 velocity


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Fish

;o& Flow com%onent 0 "s1,2

F3 /igh $o%, high $o% recession ain#ain ongi#udina connec#i!i#& and area cri#ica dep#hD o!er

barriers :shao% areas;

FH @o% $o% ain#ain area %i#h dep#h cri#ica dep#hD in poos

F /igh $o% puse chie!e area %i#h dep#h cri#ica dep#hD o!er barriers :shao%

areas;

FI /igh $o% ain#ain area %i#h 4 0> . 1>0 "1,2and E 1>H "s1,2

F /igh $o% ain#ain area %i#h !eoci#& 1>0 . 2>0 "s1

FK /igh $o% puse ain#enance o$ appropria#eL saini#& gradien# in es#uar&

F @o% $o% and high $o% ain#ain area o$ 4 1> "1,2and E 1>0 "s1,2

F10 @o% and high $o% puses chie!e su$$icien# dep#hD #o repenish"ain#ain %a#er in ri!er

associa#ed %e#ands and back%a#ers

F11 @o% $o% and high $o%s ain#ain ade5ua#e cross7sec#iona areadischargeD #o #ranspor#

nu#rien#s re5uired #o sus#ain pri"ar& produc#i!i#&

F12 Bank$u 2,I00 7 H,000 "3s 7 see Geo"orphoogic objec#i!e G1

F13 Bank$u 2,I00 7 H,000 "3s 7 see Geo"orphoogic objec#i!e G2

F1H /igh $o% )ee Eege#a#ion objec#i!e E1

F1 /igh $o% and o% $o% )ee Eege#a#ion objec#i!e EF1I @o% $o% ain#ain "ean poo !eoci#& 0>01 "s

F1 /igh $o% and o% $o% )u$$icien# dischargeD #o "ain#ain "orphoog& in and around #he

es#uar& "ou#h

F1K Bank$u 2,I00 7 H,000 "3s 7 see Geo"orphoogic objec#i!es G3 and GH


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Plants

;o& ='jective Flow com%onent g> Vallisneria,

Potomagetonand Myriophyllum

spp>;

/igh $o% " "a(>? 0>3 "

"ean; in su""er


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irds

;o& ='jective Flow com%onent


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)eomor%holo"y


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Set o'jectives $or each asse# and i"por#an# process*Ecolo"ical mana"ement o'jectives :%ha# e!e o$ ri!er hea#h is desiredP

#aking accoun# o$ cons#rain#s, and o#her uses o$ #he ri!er;*


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Set o'jectives

* 1K Fish objec#i!es* I Wa#er 5uai#& objec#i!e

* K Bird objec#i!e

* K acroin!er#ebra#e objec#i!es

* H Geo"o"orphic objec#i!es

* 8hese can be ra#ionaised #o a s"aer group $or e!aua#ion

. 13 objec#i!es


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-ey

o'j&

='j& met ='jectives descri%tion Flow com%onent

F1? 1 Qre!en# habi#a# oss #hrough dr&ing o$ shao% areas Cease #o $o%

B B1? B2? B3 '(pose Care( and "ud$a#s? shao% %a#er o!er sub"erged a5ua#ics @o% $o%

C F2 ain#ain shao% habi#a#s %i#h "odera#e7high !eoci#& $or shao% %a#er d%eing species

and spa%ners during o% $o% periods

@o% $o%

4 WA1, WA2, WA3,

WAH

4iu#e con#a"inan#s #o Grade


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dimension

. #ne?%ensive

. Cover a lon" reach

. Cross>section avera"e

* />dimension

. E?%ensive

. Cover a short reach. De%th>avera"ed

ean !eoci#& E 4ep#h 4

ean !eoci#& E

4ep#h 4

Convert


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.>D RAS model out%ut


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/>D River/D model out%ut

Eeoci#& Fo% direc#ion

esh 4ep#h


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Lower Yellow River data

* 0@ cross>sections. Surveyed every year

* Bse $or .>D model o$ whole river

* 0 sites surveyed in detail

. Lijin

. D model


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Esta'lish $low rules#nte"rate the in$ormation throu"h colla'oration:

* Qroduce a se# o$ prac#ica $o% rues #ha# s#akehoders agree on* Crea#e op#ions %i#h di$$eren# e!es o$ risk #o #he hea#h o$ #he asse#s


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='jectives %artly met Flowcom%onen

t


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*odel water resources availa'ility

Wha# are #he im%acts on river users $ro" #he $o% op#ionsP


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E?%erience and recommendations

E?%erience

777 Ge# ne% #hink, "e#hod $ro" us#raian e(per#

7778he resu# cose #o #he #hink o$ ri!er "anager, and can be

i"pe"en#

Recommendation 7778he e7$o% assess"en# can be appied in o#her ri!er in China


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$HA )*+ ,*R )*+R A$$- $.*

2012 yellow river china.ppt

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