New Zealand launches plan to revive the health of lakes and rivers



After years of delay, the New Zealand government is pushing ahead on a national plan to clean up the nation’s lakes, rivers and wetlands.
from http://www.shutterstock.com, CC BY-ND

Troy Baisden, University of Waikato

New Zealand’s government released a plan to reverse the decline of iconic lakes and rivers this week. It proposes higher standards for water quality, interim controls on land intensification and a higher bar on ecosystem health.

Freshwater quality was a significant election issue in 2017 and the proposal follows the recent release of Environment Aotearoa 2019, which links agriculture to freshwater degradation.

The agenda for change recognises that the perceived trade-off between agriculture and the environment makes little sense. If New Zealand trades internationally on a reputation for a healthy environment, continued degradation of water fouls the value of major exports. It also spoils the natural heritage that fuels the tourist economy and many New Zealanders consider a birthright.




Read more:
Six ways to improve water quality in New Zealand’s lakes and rivers


What’s changed?

The policy announcement reflects more than a decade of previous attempts, with the first draft notified in 2008, the first implementation in 2011, and major updates in 2014 and 2017. The new policy package addresses major deficiencies in the earlier versions, and has been fast-tracked to curtail freshwater pollution that has been allowed to get worse longer than it should.

The new regulations are designed to protect the health of entire ecosystems from excess nutrients. Some of the most compelling provisions draw clear lines where limits need to be set to prevent further slippage.

There’s a halt to significant expansions of dairy farming and irrigation, and limits on the use of nitrogen in some key catchments. Further improvements will better protect waterways and wetlands from grazing animals, and limits will be placed on recently criticised winter grazing.




Read more:
New Zealand’s urban freshwater is improving, but a major report reveals huge gaps in our knowledge


Two significant steps will reverse the main cause of delays in the past. The first is an implementation at national level. This should reduce reliance on a National Policy Statement (NPS) that requires regional councils to implement changes to local legislation.

This step will be reinforced by signalled changes to the national legislation, the Resource Management Act, which in turn will make regional council actions less cumbersome and underfunded. Secondly, where the new NPS requires region-by-region action, caps on increasing agricultural intensity will apply until regional plans have been amended to comply.

These steps increase the chance of preventing further degradation. Some benefits, such as a reduced risk of getting sick from swimming, should come through quickly. Others, such as reduced nutrient loads of nitrogen and phosphorous and a healthier ecology in lakes and rivers, could take years or decades.

Challenges ahead

To improve freshwater quality, we will need reliable monitoring and modelling tools to measure progress. These will need to be an integral part of the process, even though any decisions are ultimately determined by values. Working through this challenge highlights two large issues that remain unresolved in the plan.

The first is a lack of monitoring tools. The announcement didn’t take up recommendations in the Freshwater Leaders Group’s report that described present tools as unsuitable for providing enough confidence to move forward. The implications are that promised investment to develop the nutrient-monitoring Overseer tool will only eventually get us what we needed years ago.

Tools need to connect nutrient management with farm and catchment planning. They should focus more on future solutions rather than quantifying impacts of past land use that led to freshwater pollution.

The role for Māori

The issue of water allocation is even more important given the constitutional role Māori play in New Zealand’s freshwater governance, enshrined in the Treaty of Waitangi.

One of the most intriguing options left open to consultation is the extent to which Māori values will receive compulsory consideration, or alternately, be afforded consideration place-by-place by individual iwi (tribes) and hapū (sub-tribes). The advisory body representing Māori interests in the environment and in land-based industries raised concerns that these options are too weak.

These concerns are substantially amplified by the recent report by the Waitangi Tribunal, suggesting that the delays and dysfunction associated with freshwater policies have disproportionately undermined the ability of Māori to maintain holistic cultural connections to water, and obtain fair value from lands recently returned to them by the Crown.

These concerns and the need for better planning tools that resolve past degradation and enable future investment ultimately go hand-in-hand. Māori businesses, enabled by treaty settlements, are leading innovators and investors using social and environmental values to drive high-value exports.

The release now opens a period of consultation and national debate. This will pit the passionate voice of the farming community against voices representing our freshwater ecosystems. But this is the first time a proposed plan brings together all aspects of policy we need to keep aquatic life healthy.The Conversation

Troy Baisden, Professor and Chair in Lake and Freshwater Sciences, University of Waikato

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Six ways to improve water quality in New Zealand’s lakes and rivers


File 20180416 566 16cxzx5.jpg?ixlib=rb 1.1
Lake Tarawera, seen from its outlet, has excellent but declining water quality.
Troy Baisden, CC BY-SA

Troy Baisden, University of Waikato

Two years ago, New Zealanders were shocked when contaminated drinking water sickened more than 5,000 people in the small town of Havelock North, with a population of 14,000. A government inquiry found that sheep faeces were the likely source of bacterial pathogens, which entered an aquifer when heavy rain flooded surrounding farmland.

A second phase of the inquiry identified six principles of international drinking water security that had been bypassed. Had they been followed, the drinking water contamination would have been prevented or greatly reduced.

Here, I ask if the approach recommended by the Havelock North inquiry to prevent drinking water contamination can be extended to reduce the impacts of nutrient contamination of freshwater ecosystems.




Read more:
We all live downstream – it’s time to restore our freshwater ecosystems


Freshwater degraded and in decline

Most measures of the ecological health and recreational value of New Zealand’s lowland rivers and lakes have been rated as degraded and still declining. Intensive agriculture often cops much of the blame, but primary industry exports remain the heart of New Zealand’s economy.

The challenge posed by this trade-off between the economy and the environment has been described as both enormous, and complex. Yet it is a challenge that New Zealand’s government aims to tackle, and continues to rate as a top public concern.

An important lesson from the Havelock North inquiry is that sometimes there is no recipe – no easy list of steps or rules we can take to work through a problem. Following existing rules resulted in a public health disaster. Instead, practitioners need to follow principles, and be mindful that rules can have exceptions.

For freshwater, New Zealand has a similar problem with a lack of clear actionable rules, and I’ve mapped a direct link between the six principles of drinking water security and corresponding principles for managing nutrient impacts in freshwater.

Six principles for freshwater

Of the six principles of drinking water safety, the first is perhaps the most obvious: drinking water safety deserves a “high standard of care”. Similarly, freshwater nutrient impact management should reflect a duty of care that mirrors the scale of impacts. Our most pristine freshwater, like Lake Taupo, and water on the verge of tipping into nearly irreversible degradation, deserve the greatest effort and care.

Second, drinking water safety follows a clear logic from the starting point: “protecting the integrity of source water is paramount”. For nutrient impact management in freshwater, we must reverse this and focus on a more forensic analysis along flowpaths to the source of excess nutrients entering water. Our current approach of using estimates of sources is not convincing when tracers could point to sources in the same way DNA can help identify who was at a crime scene. We must link impacts to sources.

Third, drinking water safety demands “multiple barriers to contamination”. For freshwater, we’re better off taking a similar but different approach – maximising sequential reductions of contamination. There are at least three main opportunities, including farm management, improving drains and riparian vegetation, and enhancing and restoring wetlands. If each is 50% effective at reducing contaminants reaching waterways, the three are as good as a single barrier that reduces contamination by 90%. The 50% reductions are likely to be much more achievable and cost effective.

Managing hot spots and hot moments

The fourth principle of drinking water safety was perhaps the most dramatic failure in the Havelock North drinking water crisis: “change precedes contamination”. Despite a storm and flood reaching areas of known risk for contaminating the water supply, there were no steps in place to detect changing conditions that breached the water supply’s classification as “secure” and therefore safe.

A similar, but inverted principle can keep nutrients on farm, where we want them, and keep them out of our water. Almost all processes that lead to nutrient excess and mobilisation, as well as its subsequent removal, occur in hot spots and hot moments.

This concept means that when we look, we find that roughly 90% of excess nutrients come from less than 10% of the land area, or events that represent less than 10% of time. We can identify these hot spots and hot moments, and classify them into a system of control points that are managed to limit nutrient contamination of freshwater.

Lake Taupo, New Zealand’s largest lake, has a nitrogen cap and trade programme in place, which allocates farmers individual nitrogen discharge allowances.
from Shutterstock, CC BY-SA

Establishing clear ownership

A fifth principle for drinking water seems obvious: “suppliers must own the safety of drinking water”. Clear ownership results in clear responsibility.

Two world-leading cap-and-trade schemes created clear ownership of nutrient contaminants reaching iconic water bodies. One is fully in place in the Lake Taupo catchment, and another is still under appeal in the Lake Rotorua catchment.

These schemes involved government investment of between NZ$70 million and NZ$80 million to “buy out” a proportion of nutrients reaching the lakes. This cost seems unworkable across the entire nation. Will farmers or taxpayers own this cost, or is there any way to pass it on to investors in new, higher-value land use that reduces nutrient loss to freshwater? A successful example of shifting to higher value has been conversions from sheep and beef farming to vineyards.

As yet, the ownership of water has made headlines, but remains largely unclear outside Taupo and Rotorua when it comes to nutrient contaminants. Consideration of taxing the use of our best water could be much more sensible with a clearer framework of ownership for both water and the impacts of contaminants.

The final principle of drinking water safety is to “apply preventative risk management”. This is a scaled approach that involves thinking ahead of problems to assess risks that can be mitigated at each barrier to contamination.

For nutrient management in water, a principled approach has to start with the basic fact that water flows and must be managed within catchments. From this standpoint, New Zealand has a good case for leading internationally, because regional councils govern the environment based on catchment boundaries.

Within catchments we still have a great deal of work to do. This involves understanding how lag effects can lead to a legacy of excess nutrients. We need to manage whole catchments by understanding, monitoring and managing current and future impacts in the entire interconnected system.

The ConversationIf we can focus on these principles, government, industry, researchers, NGOs and the concerned public can build understanding and consensus together, enabling progress towards halting and reversing the declining health and quality of our rivers and lakes.

Troy Baisden, Professor and Chair in Lake and Freshwater Sciences, University of Waikato

This article was originally published on The Conversation. Read the original article.

Know Right Now: Inside the Mystery of Greenland’s Vanishing Lakes


TIME

[newsletter-the-brief]

Two lakes in Greenland holding enormous amounts of water were drained within the course of weeks, researchers say.

Watch today’s Know Right Now to find out more about these vanishing lakes.

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Holiday Planning: NSW Road Trip 2010


The planning for my holiday is now well and truly underway, with the holiday now being referred to as my ‘NSW Road Trip 2010.’ There is also a website address for viewing my itinerary and for following my progress. It has been a rushed process in the end, organising this road trip, so there will yet be some changes to the itinerary.

I am expecting changes in far western NSW due to road conditions, especially given recent weather conditions out that way, including the widespread rain and flooding that has taken place. Given I have only got a small rental for this trip, I am not really prepared to take the car onto certain roads (which I believe will be part of the rental agreement anyway).

At this stage I am expecting to miss Ivanhoe and head for Mildura instead. I also expect to miss Tibooburra in the far northwest corner of the state, as the Silver City Highway is largely dirt. With these probable changes to the itinerary, I will also miss driving through the Menindee Lakes area, which really was something I was hoping to see – another time perhaps.

On another ‘track,’ I found our that the hottest February temperature experienced in Ivanhoe was around 48 degrees Celsius. No, not the reason I am thinking of bypassing Ivanhoe – most centres out west have similar temperatures in February anyway.

The website:

http://www.kevinswilderness.com/NSW/nswRoadTrip2010.html