OVER WATER – 76: DE LANDBOUW EN DE KRW OPGAVE

 

| 28-01-2017 | 12.30 uur |


 

OVER WATER – 76

 

fontein-bouvigneRecent is uitgekomen “Landbouw en de KRW-opgave nutriënten in regionale wateren“. Een lijvig rapport dat je als waterschapsbestuurder gelezen moet hebben. Het geeft de lezer meer inzicht in de enorme opgave waarvoor we ten aanzien van de stikstof en fosfaatnormen gesteld staan. Deze lijken schier onhaalbaar. Als ingezoomd wordt op mijn eigen waterschap Brabantse Delta, dan laten de cijfers zien wat de opgave is maar ook wat de oorzaken zijn van de huidige stikstof en fosfaat concentraties. Voor fosfaat is slechts 5 tot 10 procent afkomstig van de actuele bemesting. De nalevering vanuit de bodem is 25 tot 50 % (afkomstig van wat de zee ooit op deze gronden heeft afgezet) en de aanvoer uit het buitenland en/of inlaat uit Rijkswateren is 25 tot 50 %. Historische bemesting is 5 tot 10 %. Fosfaat lozingen via de industrie, RWZi’s, kwel, natuurgronden en overige agrarische bronnen zijn allen beperkt van omvang. Bij stikstof is de actuele bemesting 25 tot 50 %, de aanvoer uit het buitenland en/of inlaat uit rijkswateren is ook 25 tot 50 %. Van de overige bronnen is alleen de atmosferische depositie nog relevant. De andere bronnen zijn allen beperkt van omvang. De benodigde reductie (in %) van af- en uitspoeling van stikstof uit landbouwpercelen om de opgave te realiseren bedraagt, afhankelijk van de gekozen variant, tussen de 30 en 43 procent. De benodigde reductie (in %) van af- en uitspoeling van fosfor uit landbouwpercelen om de opgave te realiseren bedraagt, afhankelijk van de gekozen variant, tussen de 8 en 33 procent. Als de niet aan bemesting gerelateerde levering aan de bodem niet aan de landbouwreductie wordt toegerekend bedraagt de landbouwopgave voor fosfor in het werkgebied van de Brabantse Delta minder dan 10 %. Als deze wel aan de landbouw wordt toegerekend is deze tussen de 20 en 40 %. Ook waterschappen (RWZI’s) zijn, gekeken naar het landelijk gemiddelde verantwoordelijk voor 9 % van de stikstoflozingen en 15 % voor de fosforlozingen. Een uitschieter is hierbij waterschap de Dommel, zowel voor stikstof als voor fosfor zijn de RWZI’s daar voor 25 à 50 % verantwoordelijk voor de lozingen. In het waterschap Brabantse Delta zijn de RWZI’s voor stikstof minder dan 5 % de veroorzaker en bij fosfor voor 5 à 10 %.

Mijn conclusie voor mijn eigen waterschap: de KRW normen zijn niet haalbaar voor 2027 en misschien wel, omdat de bronnen vaak buiten onze mogelijkheden liggen (nalevering bodem en buitenland en/of inlaat uit rijkswateren), nooit! Ook landelijk zou de vraag van haalbaarheid, naar mijn mening, op de politieke agenda moeten komen!

Recent is uitgekomen het “waterschapspeil 2016“. Het boekje geeft de trends en ontwikkelingen in het regionale waterbeheer. Voor een ieder die geïnteresseerd is in de waterschapswereld of als raadslid hier meer over wilt weten, het lezen zeker waard.

Op de nieuwjaarsreceptie van de provincie Noord-Brabant kreeg ik bij vertrek de brochure “Over ranke torenspitsen” uitgereikt. Een uitgave van de stichting de Brabantse Hoeders. De brochure is bedoeld als handreiking tot het redden van in onbruik geraakte kerken. Maar deze handreiking is ook bruikbaar voor andere monumentale bouwwerken in ons mooie Brabantse landschap. De brochure kan volgens de website van de Brabantse Hoeders gratis worden besteld door een mailtje te sturen aan [email protected]. In de brochure worden alle kerken in Noord-Brabant uitgenodigd mee te doen aan de Brabantse Open Kerkendag, zodat een ieder ervaart welk een prachtige monumenten dit vaak zijn.

24 januari
In de morgen de vergadering van het Dagelijks Bestuur met als agendapunten onder andere: de beslissing op een bezwaarschrift, de beleidsregel schadevergoeding kabels en leidingen, de heroverweging status kantoor Heerle, de partiële herziening van de algemene regels grondwater onttrekkingsdiepten en de beleidsregel agrarische beregening uit grondwater bij schaarste, de dijkversterking Geertruidenberg en Amertak (de nota kansrijke alternatieven), instemming bos- en waterplan Ulvenhoutse Voorbos en de portefeuilleverdeling en tijdsbesteding tijdens waarneming dijkgraaf. Het vertrek van de dijkgraaf per 1 maart betekent voor alle DB leden een verzwaring van hun taak. We zullen elkaar vaker moeten vervangen. Om de taak van de waarnemend dijkgraaf (Huub Hieltjes) te verlichten heb ik een deel van zijn DB portefeuille overgenomen. Ik krijg er, gedurende zijn waarneming van de dijkgraaf, het project zoetwatervoorziening Roode Vaart, de gemeente Moerdijk en het uitvoeringsproject nieuwbouw, verbetering en inrichting regionale waterkeringen (voor zover gelegen in de tien gemeenten die ik in portefeuille heb) erbij. Voor mij een stevige toename van taken. Ze passen goed bij mijn huidige taken pakket. Vooral op de verbetering van de regionale waterkeringen verheug ik mij. Met de primaire dijkverbeteringsprojecten, zoals de Overdiepse Polder en het dijkverbeteringsproject Geertruidenberg/Amertak, heb ik de nodige ervaringen opgedaan die ik graag gebruik voor de aanpak van de regionale keringen.     

25 januari
De waterkring in Raamsdonksveer. Ik heb de algemene presentatie gegeven en collega Kees de Jong die over het watersysteembeheer. Daarna hebben we gezamenlijk de vragen van de aanwezige overwegend agrarische ondernemers beantwoord.

26 januari
ulvenhoutse-bosIn de morgen het bestuurlijk overleg Ulvenhoutse Voorbos waarin de stand van zaken werd besproken van het bos- en waterplan en de voortgang van de PAS. Ook een wandeling met toelichting van twee deskundigen van Staatsbosbeheer door het bos gemaakt. 

In de middag het Avans symposium “Futurefields“. Met onder andere Itzik Amiel, een inspirerend spreker over het (sociale) netwerken met als titel “Power of connection”.

27 januari
Vandaag een klankbordgroep Tweede Kamer verkiezingen van de Unie met de punten die de Unie wil inbrengen bij de Kabinetsformatie en de punten die de Unie gezamenlijk met de VNG en het IPO wil inbrengen.

Louis van der Kallen



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