National Water Act: Classes and resource quality objectives of water resources for catchments of Lower Vaal (GN. 470 of 2016)

This gazette is also available free online at www.gpwonline.co.za STAATSKOERANT, 22 APRIL 2016 No. 39943 721 DEPARTMENT OF WATER AND SANITATION NO. 470 22 APRIL 2016 470 National Water Act (36/1998): Classes and Resource Quality Objectives of Water Resources for Catchments of the Lower Vaal 39943 NATIONAL WATER ACT, 1998 (ACT NO.36 OF 1998) CLASSES AND RESOURCE QUALITY OBJECTIVES OF WATER RESOURCES FOR CATCHMENTS OF THE LOWER VAAL I, Nomvula Paula Mokonyane, in my capacity as Minister of Water and Sanitation, and duly authorised in terms of section 13(4) of the National Water Act (Act No. 36 of 1998) hereby publish the notices for the classes of water resources and resource quality objectives for catchments of the Lower Vaal, in the Schedule, to be issued under section 13(4) of the National Water Act (Act No. 36 of 1998). Acting Director: Water Resource Classification Attention: Ms Lebogang Matlala Department of Water and Sanitation Ndinaye Building 178 Francis Baard Street Private Bag X313 Pretoria 0001 E-mail: matlalal@dws.gov.za Facsimile: 012 336 6712 This gazette is also available free online at www.gpwonline.co.za 722 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016 SCHEDULE CLASSES OF WATER RESOURCES AND RESOURCE QUALITY OBJECTIVES FOR CATCHMENTS OF THE LOWER VAAL IN TERMS OF SECTION 13(1)(A) AND (B) OF THE NATIONAL WATER ACT (ACT NO.36 OF 1998) 1 DESCRIPTION OF WATER RESOURCE 1. The classes and resource quality objectives are determined for all or part of every significant water resource within the catchments of the Lower Vaal as set out below: Water Management Area: Vaal Drainage Regions: C primary drainage region Rivers: Vaal River System 2. The Minister has, in terms of section 12 of the National Water Act, Act No 36 of 1998 (the Act), prescribed a system for classifying water resources by promulgating Regulation 810, Government Gazette 33541 dated 17 September 2010. In terms of section 13(1) of the Act the Minister must, as soon as reasonably practicable after the Minister has prescribed a system for classifying water resources and subject to subsection (4), by notice in the Gazette, determine for all or part of every significant water resource, a class in accordance with the prescribed classification system. 3. The Minister, in terms of section 13(1)(a) of the Act, has determined the following classes of each significant water resource for catchments of the Lower Vaal. 4. The Minister, in terms of section 13(1)(b) of the Act, has determined the following resource quality objectives of each significant water resource for catchments of the Lower Vaal. This gazette is also available free online at www.gpwonline.co.za STAATSKOERANT, 22 APRIL 2016 No. 39943 723 2 DETERMINATION OF THE CLASS OF WATER RESOURCES AND RESOURCE QUALITY OBJECTIVES IN TERMS OF SECTION 13(1)(A) AND (B) OF THE NATIONAL WATER ACT (ACT NO.36 OF 1998) 1. A summary of the water resource classes for Integrated Units of Analysis (Figure 1) and ecological categories for the Lower Vaal is set out in Table 1. 2. Integrated Units of Analysis (IUA) are classified in terms of their extent of permissible utilization and protection as either Class I: indicating high environmental protection and minimal utilization; or Class II indicating moderate protection and moderate utilization; and Class III indicating sustainable minimal protection and high utilization. 3. Resource Quality Objectives (RQO) are defined for each prioritised resource unit (RU) for every IUA in terms of water quantity, quality, habitat and biota as shown in Table 2 – 8 respectively. 4. Where specified, the ecological category or Recommended Ecological Category (REC) means the assigned ecological condition by the Minister to a water resource that reflects the ecological condition of that water resource in terms of the deviation of its biophysical components from a predevelopment condition. 5. RQO are applicable upon the date of approval by the Minister, unless otherwise specified. This gazette is also available free online at www.gpwonline.co.za 724 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016 1. W at er R es ou rc e C la ss es o f t he L ow er V aa l Ta bl e 1: W at er R es ou rc e C la ss es p er In te gr at ed U ni t o f A na ly si s an d E co lo gi ca l C at eg or ie s pe r B io p hy si ca l N od e In te gr at ed U ni t of A na ly si s (IU A ) W at er R es ou rc e C la ss B io ph ys ic al N od e N am e Q ua te rn ar y C at ch m en t R iv er N am e Tr ib ut ar y N am e G ro ss C at ch m en t A re a (k m 2 ) N at ur al M A R (m ill io n m 3 /a ) P re se nt E co lo gi ca l S ta te R ec om m en de d E co lo gi ca l C at eg or y U pp er H ar ts R iv er (L A 1) II LA 1. 1 C 31 B V aa l R iv er H ar ts R iv er 31 45 17 .0 6 C C LA 1. 2 C 31 C H ar ts R iv er K le in H ar ts 15 54 12 .1 8 C C M id dl e H ar ts R iv er (L A 2) II LA 2. 1 C 31 E V aa l R iv er H ar ts R iv er 91 09 45 .3 3 C C D ry H ar ts R iv er (L A 3) III LA 3. 1 C 32 D H ar ts R iv er D ry h ar ts 10 20 5 48 .7 D D Lo w er H ar ts R iv er (L A 4) II LA 4. 2 C 33 A V aa l R iv er H ar ts R iv er 11 67 3. 29 A /B A /B E W R 17 C 33 C V aa l R iv er H ar ts R iv er 31 02 9 14 7. 85 D D V aa l R iv er fr om do w ns tr ea m of B lo em ho f D am to D ou gl as W ei r (L B ) III LB .1 C 33 C H ar ts R iv er U nn am ed T rib ut ar y 47 43 11 .6 2 A /B A /B E W R 16 C 91 A V aa l R iv er 10 84 74 33 03 .1 D D E W R 18 C 92 B V aa l R iv er 15 76 85 34 07 .7 9 C C D ou gl as E W R C 92 B V aa l R iv er 19 44 79 37 59 C /D C U p p e r V a a l W a te r M a n a g e m e n t A re a In te g ra te d U n its o f A n a ly si s Q u a te rn a ry C a tc h m e n ts R iv e rs % a D a m s B io p h ys ic a l N o d e s M C I I M I M C II I se M lu 0 2 5 5 0 7 5 1 0 0 1 2 5 1 7 5 2 0 0 k m a ve r a ff a ir s .. .. s C L A S S IF IC A T IO N O F S IG N IF IC A N T W A T E R R E S O U R C E S ( R IV E R . W E T L A N D S , G R O U N D W A T E R A N D L A IE S ) IN T H E U P P E R , M ID D L E A N D L O W E R V A A L W A T E R M A N A G E M E N T A R E A S ( W M A ) S , 9 , 1 0 L o w e r V a a l: P ro p o se d M a n a g e m e n t C la ss e s A 3 This gazette is also available free online at www.gpwonline.co.za STAATSKOERANT, 22 APRIL 2016 No. 39943 725 Fi gu re 1 : I nt eg ra te d U ni ts o f A na ly si s in th e Lo w er V aa l This gazette is also available free online at www.gpwonline.co.za 726 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016 P ag e | 4 Ta bl e 2: R es ou rc e Q ua lit y O bj ec tiv es (R Q O ) f or R IV E R W A T E R Q U A N TI TY in th e Lo w er V aa l R IV E R W A TE R Q U A N TI TY IU A C la ss R iv er R U B io ph ys ic al N od e R E C C om po ne nt S ub C om po ne nt R Q O In di ca to r/ m ea su re N um er ic al L im its LA 4 ll H ar ts R iv er R U 6 E W R 17 D Q ua nt ity Lo w F lo w s Lo w fl ow s ne ed to b e m an ag ed to k ee p th e ec os ys te m in a su st ai na bl e co nd iti on , in cl ud in g re du ci ng un na tu ra l d ai ly flu ct ua tio ns . E W R m ai nt en an ce lo w an d dr ou gh t f lo w s: H ar ts E W R 17 in C 33 C M A R = 1 47 .8 5x 10 ⁶m ᶟ R E C =D c at eg or y* M ai nt en an ce lo w fl ow s (m ³/s ) (P er ce nt ile ) D ro ug ht fl ow s (m ³/s ) (P er ce nt ile ) O ct 1. 5 (1 0) 0. 00 1 (9 9) N ov 2. 0 (1 0) 0. 00 1 (9 9) D ec 2. 5 (2 0) 0. 00 1 (9 9) Ja n 3. 0 (2 0) 0. 00 1 (9 9) F eb 4. 0 (3 0) 0. 00 1 (9 9) M ar 5. 0 (3 0) 0. 00 1 (9 9) A pr 4. 0 (3 0) 0. 00 1 (9 9) M ay 3. 0 (1 0) 0. 00 1 (9 9) Ju n 2. 5 (1 0) 0. 00 1 (9 9) Ju l 2. 0 (1 0) 0. 00 1 (9 9) A ug 1. 5 (1 0) 0. 00 1 (9 9) S ep 1. 0 (1 0) 0. 00 1 (9 9) LB lll V aa l R iv er R U 8 E W R 16 D Q ua nt ity H ig h F lo w s H ig h flo w s ne ed to b e us ed to in tr od uc e ha bi ta t v ar ia bi lit y. E W R m ai nt en an ce h ig h flo w s: V aa l E W R 16 in C 91 A M A R = 1 69 9. 3x 10 ⁶m ᶟ R E C =D c at eg or y* M ai nt en an ce h ig h flo w s (m ³/s ) (P er ce nt ile ) N ov 15 .8 ( 60 ) Ja n 15 .2 9 (9 0) F eb 16 .9 29 ( 99 ) M ar 15 .2 9 (9 9) III V aa l R iv er R U 9 E W R 18 C Q ua nt ity Lo w F lo w s T he lo w fl ow s sh ou ld be im pr ov ed to su pp or t t he ec os ys te m a nd n o ze ro fl ow c on di tio ns sh ou ld b e al lo w ed . E W R m ai nt en an ce lo w flo w s: V aa l E W R 18 in C 92 B M A R = 3 34 7. 2x 10 ⁶m ᶟ R E C =C c at eg or y* M ai nt en an ce lo w fl ow s (m ³/s ) (P er ce nt ile ) D ro ug ht fl ow s (m ³/s ) (P er ce nt ile ) O ct 2. 30 9 0. 73 9 N ov 3. 16 7 1. 72 5 D ec 3. 58 9 1. 95 Ja n 4. 45 4 2. 41 4 F eb 5. 98 9 3. 23 9 M ar 5. 13 1 2. 77 6 A pr 3. 91 2. 12 3 M ay 2. 41 2 1. 31 9 Ju n 1. 65 0. 91 2 Ju l 1. 36 1 0. 75 6 A ug 1. 33 5 0. 68 8 S ep 1. 41 2 0. 78 4 This gazette is also available free online at www.gpwonline.co.za STAATSKOERANT, 22 APRIL 2016 No. 39943 727 P ag e | 5 Ta bl e 3: R es ou rc e Q ua lit y O bj ec tiv es (R Q O ) f or R IV E R W A T E R Q U A LI TY in th e Lo w er V aa l R IV E R W A TE R Q U A LI TY IU A C la ss R iv er R U N od e R E C C om po ne nt S ub C om po ne nt R Q O In di ca to r/ m ea su re N um er ic al L im its 95 th P er ce nt ile LA 2 ll V aa l R iv er R U 3 V C 57 C Q ua lit y N ut rie nt s N ut rie nt c on ce nt ra tio ns n ee d to b e m an ag ed to a ch ie ve a m es ot ro ph ic o r go od st at e. P ho sp ha te (P O ₄) * ≤ 0. 02 5 m g/ L P N o da ta N itr at e (N O ₃) & N itr ite ( N O ₂) * ≤ 1. 00 m g/ L N N o da ta T ot al A m m on ia * ≤ 73 µ g/ L N 0. 16 28 LB lll V aa l R iv er R U 11 D ou gl as E W R C Q ua lit y N ut rie nt s N ut rie nt s co nc en tr at io ns s ho ul d be m ai nt ai ne d at lo w le ve ls to li m it al ga l gr ow th . P ho sp ha te (P O ₄) * ≤ 0. 02 5 m g/ L P N o da ta N itr at e (N O ₃) & N itr ite ( N O ₂) * ≤ 1. 00 m g/ L N 0. 68 5 T ot al A m m on ia * ≤ 73 µ g/ L N 0. 13 9 LA 4 ll V aa l R iv er R U 6 E W R 17 D Q ua lit y S al ts S al t c on ce nt ra tio ns n ee d to b e re du ce d to le ve ls w hi ch a re a cc ep ta bl e fo r irr ig at io n. E le ct ric al c on du ct iv ity * ≤ 11 1 m S /m N o da ta LB lll V aa l R iv er R U 11 D ou gl as E W R C Q ua lit y S al ts S al in ity c on ce nt ra tio ns in th is R U m us t b e m an ag ed to e ns ur e th at w at er q ua lit y is su ita bl e fo r i rr ig at ed a gr ic ul tu re . E le ct ric al c on du ct iv ity * ≤ 85 m S /m 11 1. 46 LB S ys te m V ar ia bl es H ig h te m pe ra tu re s an d lo w o xy ge n le ve ls m us t b e im pr ov ed in o rd er to k ee p th e ec os ys te m in a s us ta in ab le c on di tio n. T em pe ra tu re * ≤ ab s( de v. fr om am bi en t) 2 °C N o da ta D is so lv ed o xy ge n * ≥ 6 m g/ L O ₂ N o da ta LB lll V aa l R iv er R U 8 E W R 16 D Q ua lit y T ox ic an ts T ox ic an ts s ho ul d no t p os e a hi gh r is k to hu m an h ea lth . F * ≤ 3. 0 m g/ L 0. 51 15 A l* ≤ 15 0 µg /L N o da ta A s* ≤ 13 0 µg /L N o da ta C d ha rd * ≤ 5. 0 µg /L N o da ta C r( V I) * ≤ 20 0 µg /L N o da ta C u ha rd * ≤ 8. 0 µg /L N o da ta H g* ≤ 1. 70 µ g/ L N o da ta M n* ≤ 13 00 µ g/ L N o da ta P b ha rd * ≤ 13 .0 0 µg /L N o da ta S e* ≤ 30 µ g/ L N o da ta Z n* ≤ 36 µ g/ L N o da ta C ho rin e* ≤ 5. 0 µg /L fr ee C l N o da ta E nd os ul fa n* ≤ 0. 20 0 µg /L N o da ta A tr az in e* ≤ 10 0 µg /L N o da ta LB lll V aa l R iv er R U 11 D ou gl as E W R C Q ua lit y P at ho ge ns M ic ro bi al c on ta m in at io n m us t b e m in im is ed to r ed uc e th e im pa ct o n us ab ili ty o f irr ig at ed c ro ps . E .c ol i* ≤ 13 0 co un ts /1 00 m l N o da ta This gazette is also available free online at www.gpwonline.co.za 728 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016 P ag e | 6 Ta bl e 4: R es ou rc e Q ua lit y O bj ec tiv es fo r R IV E R IN S TR E A M a nd R IP A R IA N H A B IT A T a nd B IO T A in th e Lo w er V aa l c at ch m en t IU A C la ss R iv er R U R E C R Q O N um er ic al L im its LA 2. M id dl e H ar ts R iv er II V aa l 3 C In st re am a nd R ip ar ia n ha bi ta t m us t b e in a m od er at el y m od ifi ed c on di tio n or b et te r. In st re am b io ta m us t b e in m od er at el y m od ifi ed c on di tio n or b et te r. T he im po rt an ce o f t he R U as a r ef ug e ha bi ta t a nd n ur se ry a re a fo r fis h m us t b e en su re d. C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. Lo w f lo w s an d dr ou gh t flo w s m us t su pp or t th e de si re d in st re am a nd r ip ar ia n co nd iti on fo r ec os ys te m m ai nt en an ce a nd fo r us er s. W at er q ua lit y: In st re am c on ce nt ra tio n of n ut rie nt s m us t b e at a le ve l w he re it s up po rt s th e de si re d In st re am an d R ip ar ia n ha bi ta t c on di tio ns . T he c on ce nt ra tio n of t ox in s m us t no t be a t a le ve l t ha t is t ox ic t o aq ua tic o rg an is m s an d a th re at to h um an h ea lth . In st re am an d R ip ar ia n ha bi ta t In te gr ity ca te go ry ≥ C ( ≥ 62 ). N um er ic al v al ue s of m et ric s as s pe ci fie d. F is h ec ol og ic al ca te go ry : ≥ C (≥ 62 ). A ss em bl ag e at tr ib ut es a s sp ec ifi ed M ac ro in ve rt eb ra te e co lo gi ca l c at eg or y: ≥ C ( ≥ 62 ). A ss em bl ag e at tr ib ut es a s sp ec ifi ed In st re am E co st at us ca te go ry ≥ C (≥ 62 ). M et ric c om po si tio n as s pe ci fie d. R ip ar ia n E co st at us ca te go ry ≥ C (≥ 62 ). M et ric c om po si tio n as s pe ci fie d. LA 4. L ow er H ar ts R iv er II V aa l 6 D In st re am a nd R ip ar ia n ha bi ta t m us t b e in a la rg el y m od ifi ed c on di tio n or b et te r. In st re am b io ta m us t b e in la rg el y m od ifi ed c on di tio n or b et te r. C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. Lo w f lo w s an d dr ou gh t flo w s m us t su pp or t th e de si re d in st re am a nd r ip ar ia n co nd iti on f or ec os ys te m m ai nt en an ce a nd fo r us er s. W at er q ua lit y: In st re am s al in ity m us t be a t a co nc en tr at io n th at s up po rt s th e aq ua tic e co sy st em a nd t he w at er q ua lit y re qu ire m en ts o f t he w at er u se rs fo r i rr ig at io n. In st re am an d R ip ar ia n ha bi ta t In te gr ity ca te go ry ≥ D ( ≥ 42 ). N um er ic al v al ue s of m et ric s as s pe ci fie d. F is h ec ol og ic al ca te go ry : ≥ D (≥ 42 ). A ss em bl ag e at tr ib ut es a s sp ec ifi ed M ac ro in ve rt eb ra te e co lo gi ca l ca te go ry : ≥ D (≥ 4 2) . A ss em bl ag e at tr ib ut es a s sp ec ifi ed In st re am E co st at us ca te go ry ≥ D (≥ 42 ). M et ric c om po si tio n as s pe ci fie d. R ip ar ia n E co st at us ca te go ry ≥ D (≥ 42 ). M et ric c om po si tio n as s pe ci fie d. LB . V aa l R iv er f ro m d ow ns tr ea m of B lo em ho f D am to D ou gl as W ei r III V aa l 8 D In st re am h ab ita t m us t be i n a la rg el y m od ifi ed c on di tio n or b et te r. T he r ip ar ia n ha bi ta t in te gr ity m us t be i n a la rg el y m od ifi ed o r be tte r co nd iti on t o su pp or t th e e co sy st em pu rp os es a nd fo r pr op er ty a nd r ec re at io na l v al ue s. In st re am bi ot a m us t be in la rg el y m od ifi ed co nd iti on or be tte r. T he re qu ire m en ts of ec ol og ic al ly im po rta nt s pe ci es m us t b e pr ov id ed fo r. C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. In st re am an d R ip ar ia n ha bi ta t In te gr ity ca te go ry ≥ D ( ≥ 42 ). N um er ic al v al ue s of m et ric s as s pe ci fie d. F is h ec ol og ic al ca te go ry : ≥ D (≥ 42 ). A ss em bl ag e at tr ib ut es a s sp ec ifi ed M ac ro in ve rt eb ra te e co lo gi ca l ca te go ry : ≥ D This gazette is also available free online at www.gpwonline.co.za STAATSKOERANT, 22 APRIL 2016 No. 39943 729 P ag e | 7 IU A C la ss R iv er R U R E C R Q O N um er ic al L im its H ig h fl ow s m us t b e us ed to p ro vi de h ab ita t v ar ia bi lit y W at er q ua lit y: In st re am s al in ity m us t be a t a co nc en tr at io n th at s up po rt t he a qu at ic e co sy st em a nd t he w at er q ua lit y re qu ire m en ts o f t he w at er u se rs fo r i rr ig at io n. T he c on ce nt ra tio n of t ox in s m us t no t be a t a le ve l t ha t is t ox ic t o aq ua tic o rg an is m s an d a th re at to h um an h ea lth . (≥ 4 2) . A ss em bl ag e at tr ib ut es a s sp ec ifi ed In st re am E co st at us c at eg or y ≥ D ( ≥ 42 ). M et ric c om po si tio n as s pe ci fie d. R ip ar ia n E co st at us ca te go ry ≥ D (≥ 42 ). M et ric c om po si tio n as s pe ci fie d. LB . V aa l R iv er f ro m d ow ns tr ea m of B lo em ho f D am to D ou gl as W ei r III V aa l 11 C In st re am a nd R ip ar ia n ha bi ta t m us t b e in a m od er at el y m od ifi ed c on di tio n or b et te r. In st re am b io ta m us t be i n m od er at el y m od ifi ed c on di tio n or b et te r. T he r eq ui re m en ts o f ec ol og ic al ly im po rta nt s pe ci es m us t b e pr ov id ed fo r. C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. Lo w f lo w s an d dr ou gh t flo w s m us t su pp or t th e de si re d in st re am a nd r ip ar ia n co nd iti on fo r ec os ys te m m ai nt en an ce a nd fo r us er s. N o flo w c on di tio ns m us t n ot b e al lo w ed . W at er q ua lit y: In st re am c on ce nt ra tio n of n ut rie nt s m us t b e at a le ve l w he re it s up po rt s th e de si re d In st re am an d R ip ar ia n ha bi ta t c on di tio ns . T he c on ce nt ra tio n of t ox in s m us t no t be a t a le ve l t ha t is t ox ic t o aq ua tic o rg an is m s an d a th re at to h um an h ea lth . O xy ge n co nc en tr at io n an d te m pe ra tu re s m us t be a t le ve ls t ha t su pp or t th e ec os ys te m co nd iti on M ic ro bi al c on ta m in at io n m us t be m in im is ed t o re du ce t he i m pa ct o n us ab ili ty o f irr ig at ed cr op s. In st re am an d R ip ar ia n ha bi ta t In te gr ity ca te go ry ≥ C ( ≥ 62 ). N um er ic al v al ue s of m et ric s as s pe ci fie d. F is h ec ol og ic al ca te go ry : ≥ C (≥ 62 ). A ss em bl ag e at tr ib ut es a s sp ec ifi ed M ac ro in ve rt eb ra te e co lo gi ca l c at eg or y: ≥ C ( ≥ 62 ). A ss em bl ag e at tr ib ut es a s sp ec ifi ed In st re am E co st at us ca te go ry ≥ C (≥ 62 ). M et ric c om po si tio n as s pe ci fie d. R ip ar ia n E co st at us ca te go ry ≥ C (≥ 62 ). M et ric c om po si tio n as s pe ci fie d. This gazette is also available free online at www.gpwonline.co.za 730 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016 P ag e | 8 Ta bl e 5: R es ou rc e Q ua lit y O bj ec tiv es fo r D A M W at er Q ua nt ity in th e Lo w er V aa l D am W at er Q ua nt ity IU A D am s R U C om po ne nt S ub C om po ne nt R Q O In di ca to r/ m ea su re N um er ic al L im its LA 4 S pi ts ko p D am ( 28 °7 '3 0' 'S ; 24 °3 0' 15 ''E ) R U 6 Q ua nt ity Lo w F lo w s T he d am m us t b e ab le to pr ov id e E W R r el ea se s fo r th e pr ot ec tio n of e co sy st em fu nc tio n do w ns tr ea m a nd fo r irr ig at io n E W R m ai nt en an ce lo w an d dr ou gh t f lo w s re le as es to H ar ts in C 33 C V M A R = 14 7. 85 x1 0⁶ m ³. (D ai ly re le as es fr om C 3R 00 2 to m ee t r eq ui re m en ts a t E W R 17 .) M ai nt en an ce lo w flo w s (m ³/s ) D ro ug ht fl ow s (m ³/s ) O ct 1. 5 (1 0) 0. 00 1 (9 9) N ov 2. 0 (1 0) 0. 00 1 (9 9) D ec 2. 5 (2 0) 0. 00 1 (9 9) Ja n 3. 0 (2 0) 0. 00 1 (9 9) F eb 4. 0 (3 0) 0. 00 1 (9 9) M ar 5 .0 (3 0) 0. 00 1 (9 9) A pr 4. 0 (3 0) 0. 00 1 (9 9) M ay 3. 0 (1 0) 0. 00 1 (9 9) Ju n 2. 5 (1 0) 0. 00 1 (9 9) Ju l 2. 0 (1 0) 0. 00 1 (9 9) A ug 1. 5 (1 0) 0. 00 1 (9 9) S ep 1. 0 (1 0) 0. 00 1 (9 9) This gazette is also available free online at www.gpwonline.co.za STAATSKOERANT, 22 APRIL 2016 No. 39943 731 P ag e | 9 Ta bl e 6: R es ou rc e Q ua lit y O bj ec tiv es fo r D A M W A TE R Q U A LI TY in th e Lo w er V aa l D A M W A TE R Q U A LI TY IU A D am s R U C om po ne nt S ub C om po ne nt R Q O In di ca to r/ M ea su re N um er ic al L im its 95 th P er ce nt ile LA 4 T au ng D am (2 7° 31 '3 4' 'S ; 24 °5 1' 16 ''E ) R U 5 Q ua nt ity N ut rie nt s T he n ut rie nt s ta te o f t he d am m us t b e im pr ov ed a nd m ai nt ai ne d in a m es ot ro ph ic st at e. P ho sp ha te (P O ₄) * ≤ 0. 02 5 m g/ L P 0. 1 N itr at e (N O ₃) & N itr ite ( N O ₂) * ≤ 1. 00 m g/ L N N o da ta P ho sp ha te (P O ₄) * ≤ 0. 02 0 m g/ L P N o da ta N itr at e (N O ₃) & N itr ite ( N O ₂) * ≤ 0. 85 m g/ L N 0. 68 5 LB V aa lh ar ts W ei r (2 8° 7' 1' 'S ; 24 °5 6' 45 ''E ) R U 9 Q ua nt ity N ut rie nt s N ut rie nt le ve ls m us t b e im pr ov ed a nd m ai nt ai ne d in a m es ot ro ph ic s ta te . T ot al in or ga ni c ni tr og en m us t b e im pr ov ed o ve r pr es en t c on ce nt ra tio ns . P ho sp ha te (P O ₄) * ≤ 0. 02 0 m g/ L P N o da ta N itr at e (N O ₃) & N itr ite ( N O ₂) * ≤ 0. 85 m g/ L N N o da ta D ou gl as W ei r (2 9° 02 '3 6' 'S ; 23 °5 0' 13 ''E ) R U 1 1 N ut rie nt le ve ls m us t b e im pr ov ed a nd m ai nt ai ne d in a m es ot ro ph ic s ta te . P ho sp ha te (P O ₄) * ≤ 0. 02 0 m g/ L P N o da ta N itr at e (N O ₃) & N itr ite ( N O ₂) * ≤ 0. 85 m g/ L N N o da ta LA 4 T au ng D am (2 7° 31 '3 4' 'S ; 24 °5 1' 16 ''E ) R U 5 Q ua nt ity S al ts S al in ity c on ce nt ra tio ns m us t b e m ai nt ai ne d at le ve ls a cc ep ta bl e fo r i rr ig at io n E le ct ric al C on du ct iv ity * ≤ 85 m S /m 87 .5 LB V aa lh ar ts W ei r (2 8° 7' 1' 'S ; 24 °5 6' 45 ''E ) R U 9 Q ua nt ity S al ts S al in ity c on ce nt ra tio ns m us t b e m ai nt ai ne d at le ve ls a cc ep ta bl e fo r i rr ig at io n E le ct ric al C on du ct iv ity * ≤ 85 m S /m 11 7 D ou gl as W ei r (2 9° 02 '3 6' 'S ; 23 °5 0' 13 ''E ) R U 1 1 S al in ity c on ce nt ra tio ns m us t b e m ai nt ai ne d at le ve ls a cc ep ta bl e fo r i rr ig at io n E le ct ric al C on du ct iv ity * ≤ 85 m S /m 11 1. 46 LA 4 T au ng D am (2 7° 31 '3 4' 'S ; 24 °5 1' 16 ''E ) R U 5 Q ua nt ity T ox ic an ts T he n um be rs o f c ya no ba ct er ia m us t b e ke pt w ith in m es ot ro ph ic le ve ls . C hl a : p hy to pl an kt on ≤ 20 .0 μ g/ L N o da ta LB V aa lh ar ts W ei r (2 8° 7' 1' 'S ; 24 °5 6' 45 ''E ) R U 9 Q ua lit y T ox ic an ts T he n um be rs o f c ya no ba ct er ia m us t b e ke pt w ith in m es ot ro ph ic le ve ls . C hl a : p hy to pl an kt on * ≤ 20 .0 μ g/ L N o da ta D ou gl as W ei r (2 9° 02 '3 6' 'S ; 23 °5 0' 13 ''E ) R U 1 1 C hl a : p hy to pl an kt on * ≤ 20 .0 μ g/ L N o da ta This gazette is also available free online at www.gpwonline.co.za 732 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016 P ag e | 1 0 Ta bl e 7: R es ou rc e Q ua lit y O bj ec tiv es fo r D A M B IO T A in th e Lo w er V aa l IU A C la ss D am R U R Q O N U M E R IC A L LI M IT S LA 2. M id dl e H ar ts R iv er II W en tz el D am l 3 T he d ow ns tr ea m l ow f lo w d ro ug ht f lo w r eq ui re m en ts m us t be m et t o su pp or t th e ec os ys te m an d us er s. T he im po rt an ce o f th e D am a s a fis h re fu ge a nd f or s em i-a qu at ic b io ta m us t be p ro te ct ed . T hi s in cl ud es e co lo gi ca lly a nd r ec re at io na lly im po rta nt fi sh s pe ci es . C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. W at er q ua lit y: T he c on ce nt ra tio n of n ut rie nt s m us t be a t le ve ls t ha t s us ta in e co sy st em h ea lth a nd w at er qu al ity r eq ui re m en ts o f w at er u se rs . T he d am m us t b e m ai nt ai ne d in a m es ot ro ph ic s ta te . T he c on ce nt ra tio ns o f to xi ns m us t no t be a t le ve ls t ha t ar e to xi c to a qu at ic o rg an is m s an d a th re at to h um an h ea lth . In st re am an d R ip ar ia n ha bi ta t In te gr ity ca te go ry ≥ C ( ≥ 62 ). N um er ic al v al ue s of m et ric s as s pe ci fie d. F is h ec ol og ic al ca te go ry : ≥ C (≥ 62 ). A ss em bl ag e at tr ib ut es a s sp ec ifi ed M ac ro in ve rt eb ra te ec ol og ic al ca te go ry :≥ C (≥ 6 2) . A ss em bl ag e at tr ib ut es a s sp ec ifi ed In st re am E co st at us c at eg or y ≥ C ( ≥ 62 ). M et ric c om po si tio n as s pe ci fie d. R ip ar ia n E co st at us ca te go ry ≥ C (≥ 62 ). M et ric c om po si tio n as s pe ci fie d. LA 4. L ow er H ar ts R iv er II T au ng D am 5 T he d ow ns tr ea m lo w f lo w r eq ui re m en ts t o th e H ar ts R iv er in C 31 F m us t be m et t o su pp or t a he al th y co nd iti on fo r th e ec os ys te m a nd u se rs . T he im po rta nc e of th e D am a s a fis h re fu ge a nd fo r se m i-a qu at ic b io ta m us t b e pr ot ec te d. T hi s in cl ud es e co lo gi ca lly a nd r ec re at io na lly im po rt an t f is h sp ec ie s. C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. W at er q ua lit y: T he c on ce nt ra tio n of n ut rie nt s m us t be a t le ve ls t ha t su st ai n ec os ys te m h ea lth a nd w at er qu al ity r eq ui re m en ts o f w at er u se rs . T he d am m us t b e m ai nt ai ne d in a m es ot ro ph ic s ta te . T he c on ce nt ra tio ns o f to xi ns m us t no t be a t le ve ls t ha t ar e to xi c to a qu at ic o rg an is m s an d a th re at to h um an h ea lth . Lo w fl ow r el ea se s to C 31 F as s pe ci fie d. LA 4. L ow er H ar ts R iv er II S pi ts ko p D am 6 T he d ow ns tr ea m lo w f lo w r eq ui re m en ts to t he H ar ts R iv er in C 33 C m us t be m et t o su pp or t a he al th y co nd iti on fo r th e ec os ys te m a nd u se rs . T he im po rt an ce o f th e D am a s a f is h re fu ge a nd f or s em i-a qu at ic b io ta m us t be p ro te ct ed . T hi s in cl ud es e co lo gi ca lly a nd r ec re at io na lly im po rta nt fi sh s pe ci es . C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. W at er q ua lit y: T he c on ce nt ra tio n of n ut rie nt s m us t be a t le ve ls t ha t s us ta in e co sy st em h ea lth a nd w at er qu al ity r eq ui re m en ts o f w at er u se rs . T he d am m us t b e m ai nt ai ne d in a m es ot ro ph ic s ta te . T he c on ce nt ra tio n of t ox in s m us t no t be a t a le ve l th at i s to xi c to a qu at ic o rg an is m s an d a Lo w fl ow r el ea se s to C 33 C a s sp ec ifi ed . This gazette is also available free online at www.gpwonline.co.za STAATSKOERANT, 22 APRIL 2016 No. 39943 733 P ag e | 1 1 th re at to h um an h ea lth . LB . V aa l R iv er fr om do w ns tr ea m o f B lo em ho f D am to D ou gl as W ei r III V aa lh ar ts w ei r 9 T he d ow ns tr ea m lo w f lo w r eq ui re m en ts t o th e V aa l R iv er in C 91 D m us t be m et t o su pp or t a he al th y co nd iti on fo r th e ec os ys te m a nd u se rs a nd ir rig at io n. T he im po rt an ce o f th e D am a s a f is h re fu ge a nd f or s em i-a qu at ic b io ta m us t be p ro te ct ed . T hi s in cl ud es e co lo gi ca lly a nd r ec re at io na lly im po rta nt fi sh s pe ci es . In va si on o f a qu at ic p la nt s m us t b e pr ev en te d. C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. W at er q ua lit y: T he c on ce nt ra tio n of n ut rie nt s m us t be a t le ve ls t ha t su st ai n ec os ys te m h ea lth a nd w at er qu al ity r eq ui re m en ts o f w at er u se rs . T he d am m us t b e m ai nt ai ne d in a m es ot ro ph ic s ta te . S al in ity m us t b e at le ve ls a cc ep ta bl e fo r irr ig at io n. Lo w fl ow r el ea se s to C 91 D a s sp ec ifi ed LB . V aa l R iv er fr om do w ns tr ea m o f B lo em ho f D am to D ou gl as W ei r III V aa l D ou gl as w ei r 11 T he d ow ns tr ea m lo w f lo w r eq ui re m en ts t o th e V aa l R iv er in C 92 C m us t be m et t o su pp or t a he al th y co nd iti on fo r th e ec os ys te m . T he im po rt an ce o f th e D am a s a f is h re fu ge a nd f or s em i-a qu at ic b io ta m us t be p ro te ct ed an d m us t su pp or t lo ca l re cr ea tu in an d an gl in g. T he re qu irm en ts of ec ol og ic al ly an d re cr ea tio na lly im po rt an t f is h sp ec ie s m us t b e pr ov id ed fo r. C on su m pt io n of fi sh m us t n ot p os e a he al th r is k to h um an s. W at er q ua lit y: T he c on ce nt ra tio n of n ut rie nt s m us t be a t le ve ls t ha t s us ta in e co sy st em h ea lth a nd w at er qu al ity r eq ui re m en ts o f w at er u se rs . T he d am m us t b e m ai nt ai ne d in a m es ot ro ph ic s ta te . S al in ity m us t b e at le ve ls a cc ep ta bl e fo r irr ig at io n. Lo w fl ow r el ea se s to C 92 C a s sp ec ifi ed . This gazette is also available free online at www.gpwonline.co.za 734 No. 39943 GOVERNMENT GAZETTE, 22 APRIL 2016 P ag e | 1 2 Ta bl e 8: R es ou rc e Q ua lit y O bj ec tiv es fo r G R O U N D W A TE R in th e Lo w er V aa l G R O U N D W A TE R IU A R U C om po ne nt R Q O In di ca to r/ M ea su re N um er ic al L im its A ll A ll P rio rit is ed R U s Q ua nt ity W he re w at er u se is h ig he r th an r eq ui re m en ts fo r R es er ve , S ch ed ul e 1 an d G en er al A ut ho riz at io ns , a bs tr ac tio n ra te s sh ou ld n ot ex ce ed th e av er ag e re ch ar ge v al ue s of th e aq ui fe r ar ea . A bs tr ac tio n V ol um e (Q ) p er h ec ta re > R es er ve , S ch ed ul e an d G en er al A ut ho riz at io ns . Q < A ve ra ge r ec ha rg e pe r he ct ar e A ll R U 1 A qu ife r M ed iu m to lo ng t er m w at er tr en ds s ho ul d n ot sh ow n eg at iv e de vi at io n fr om th e na tu ra l tr en d D ep th to G ro un dw at er L ev el a cc or di ng to G ro un dw at er M on ito rin g G ui de lin es . W at er le ve l f lu ct ua tio ns a ro un d th e av er ag e si te w at er le ve l s ho ul d no t e xc ee d 5. 6 m . R U 2 W at er le ve l f lu ct ua tio ns a ro un d th e av er ag e si te w at er le ve l s ho ul d no t e xc ee d 4. 4 m . R U 3 W at er le ve l f lu ct ua tio ns a ro un d th e av er ag e si te w at er le ve l s ho ul d no t e xc ee d 2. 7 m . R U 4 R U 7 R U 10 A t l ea st o ne N G w Q l M P m on ito rin g si te th at is re pr es en ta tiv e of th e aq ui fe r. W at er le ve l flu ct ua tio ns in D ol om iti c aq ui fe rs ⁶ s ho ul d no t ex ce ed 6 m . R U 5 W at er le ve l f lu ct ua tio ns a ro un d th e av er ag e si te w at er le ve l s ho ul d no t e xc ee d 16 .2 m . R U 6 W at er le ve l f lu ct ua tio ns a ro un d th e av er ag e si te w at er le ve l s ho ul d no t e xc ee d 27 .8 m . R U 8 W at er le ve l f lu ct ua tio ns a ro un d th e av er ag e si te w at er le ve l s ho ul d no t e xc ee d 30 .6 m . R U 9 W at er le ve l f lu ct ua tio ns a ro un d th e av er ag e si te w at er le ve l s ho ul d no t e xc ee d 3. 7 m .