Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Better ‘banking’, better water

Better ‘banking’, better water

By Bala Tikkisetty

Winter weather can place increased strain on the banks of farm waterways, increasing the risk of erosion from them affecting water quality.

So it’s timely to look at the issues involved in erosion generally and land management practices that can contribute to contamination of waterways.

Some of our Waikato rivers, lakes and streams have eroding banks, silted beds, water weed infestation and debatable water quality, often the result of sub-optimal land management practices.

Such practices – whether related to farming, forestry, roading or horticulture – can cause soil erosion and a build-up of contaminants such as bacteria and chemicals which end up being washed into watercourses during heavy rain.

Stock wading in water, poor cowshed effluent treatment, overgrazing, inappropriate fertiliser application, pugging and poor runoff control on cultivated land, roads and tracks can all contribute to the contamination of water bodies. Bacteria can cause water-borne diseases like giardia and cryptosporidium which in turn can cause serious health problems, while nitrates and phosphates can also create severe health disorders both for people and stock, and contribute to algal growth.

Good management of the banks of waterways can reduce these types of effects by stabilising the banks and providing a filter for contaminants washing off the land. Effective management of the banks – or riparian strips – is a key to protecting aquatic life and improving water quality generally.

Careful selection of the mix of species planted within riparian areas makes it possible to beneficially modify what’s happening with light, temperature, nutrient and sediment loads, channel and bank stability, carbon inputs, and habitat for terrestrial species.

A well-managed riparian margin will filter out contaminants, such as sediments and nutrients from farm run-off, including soil, animal dung and urine, and agricultural chemicals.

Shrubs and trees with extensive root systems, which tolerate moist soil conditions and frequent silt deposits, are ideal for stream bank erosion control. They physically hold the stream banks together and some tree roots also protect the streambed, limiting the scouring effect of running water.

Streamside vegetation provides shade which cools the water, improves dissolved oxygen levels, helps aquatic life and reduces the risk of algal blooms.

Suitable plant species beside waterways also provide cover for spawning fish, and food and habitat for nesting and juvenile birds. Such planting helps water plants and invertebrates become numerous, providing a better food supply for fish. Streamside trees can link areas of native vegetation together, extending habitat for native birds.

Besides environmental benefits, riparian planting can also help a farm’s economic bottom line.

Well designed riparian fencing can be used to improve subdivision, help with mustering, and protect animals from drowning or getting stuck in wet areas. The provision of shelter and shade is recognised as an important aspect of animal production and health.

Improved milk grades are documented where dairy sheds no longer draw water from contaminated streams. On sheep and beef properties, stock are in better health and have faster weight gain when water sources are no longer contaminated.

The council’s catchment management officers are available through our freephone 0800 800 401 to provide advice on good riparian management.

Bala Tikkisetty is a sustainable agriculture coordinator at Waikato Regional Council. Contact him on 0800 800401 or email bala.tikkisetty@waikatoregion.govt.nz

Ends

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell: On Journalism’s Future In The Era Of “Alternative Facts.”

Already, the White House has made it clear that the media are the new enemy that the new President’s supporters will be encouraged to unite against. (What else can they do now they don’t have Hillary Clinton to demonise any more?)

The fantastic phrase “alternative facts” coined by Trump spinmeister Kellyanne Conway captures the media strategy in a nutshell. More>>

 

PM's Press Conference: TPP, Trade And Minimum Wage

Prime Minister Bill English’s first official press conference of the year began with a warm welcome back from holidays. In relation to President Trump’s withdrawal from the TPP he expressed disappointment but hopes to negotiate a bilateral agreement with the US in the future. More>>

Employment: Minimum Wage To Increase To $15.75

The minimum wage will increase by 50 cents to $15.75 an hour on 1 April 2017... The starting-out and training hourly minimum wage rates will increase from $12.20 to $12.60 per hour, remaining at 80 per cent of the adult minimum wage.More>>

ALSO:

Housing: Sit-In Occupation To Stop Niki’s Eviction

The Tāmaki Redevelopment Company hopes to issue a Possession Order for 14 Taniwha Street, Glen Innes. This will give them the ability to forcibly evict Ioela ‘Niki’ Rauti who has lived at 14 Taniwha Street for 21 years... More>>

ALSO:

Gordon Campbell: On Bill English, Abroad

If David Cameron was the closest thing John Key had to a political mentor, their successors also share a whole lot in common. Theresa May and Bill English were both propelled into the top jobs as the result of unexpected resignations, and without much in the way of credible competition from their colleagues... More>>

ALSO:

Pike River: Labour Bill To Override Safety Act For Mine Entry

“Bill English has been hiding behind the legal excuse that any attempt to re-enter the mine to recover the bodies might place the mine’s owner, Solid Energy Limited, and its directors in breach of the Health and Safety at Work Act 2015." More>>

ALSO:

Gordon Campbell: On Populism And Labour 2017

For many people on the centre-left, populism is a dirty word, and a shorthand for the politics of bigotry. In this country, it has tended to be equated with the angry legions of New Zealand First. Who knew they were not just a reactionary spasm, but the wave of the future? More>>

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news