Trees on city streets cope with drought by drinking from leaky pipes
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Re: Trees on city streets cope with drought by drinking from leaky pipes
#2[deleted]
Re: Trees on city streets cope with drought by drinking from leaky pipes
#3This is not news. Having to rebore pipes due to tree roots has been around for decades
Re: Trees on city streets cope with drought by drinking from leaky pipes
#4> While the park trees contained lead isotopes normally associated with air pollution, the street trees had isotopes found in lead water pipes, which were made with metal from geologically old deposits in nearby mines.
I don't understand this part. We didn't use different sources of lead to make leaded gas and lead pipes, no?
Re: Trees on city streets cope with drought by drinking from leaky pipes
#5> While the park trees contained lead isotopes normally associated with air pollution, the street trees had isotopes found in lead water pipes, which were made with metal from geologically old deposits in nearby mines. I don't understand this part. We didn't use different sources of lead to make leaded gas and lead pipes, no?
When you need a lot of lead (enough to build plumbing for a neighborhood), you probably want to source it locally. When "1 part TEL to 1300 parts gasoline by weight is sufficient to suppress detonation",[1] you can source the lead from just about anywhere and ship it with the fuel.
Re: Trees on city streets cope with drought by drinking from leaky pipes
#6This is not news. Having to rebore pipes due to tree roots has been around for decades
Decades? Try millennia.
Re: Trees on city streets cope with drought by drinking from leaky pipes
#7This is not news. Having to rebore pipes due to tree roots has been around for decades
there is a new to me datum in that trees along residential streets are experiencing less water stress than trees in parks, due to city water leakage that was demonstrated by doing core samples on the trees to show how lead isotopes differed in the two populations of trees.
it highlights a growing concern with water in general and how carefull water monitering and management is becoming, and how what was primarily interesting to civil engineering types, has a wider audience
Re: Trees on city streets cope with drought by drinking from leaky pipes
#8> While the park trees contained lead isotopes normally associated with air pollution, the street trees had isotopes found in lead water pipes, which were made with metal from geologically old deposits in nearby mines. I don't understand this part. We didn't use different sources of lead to make leaded gas and lead pipes, no?
lead from pipes was mined localy, but the lead in parks soil is from airborn pollution and so the isotope signature will be quite different
Re: Trees on city streets cope with drought by drinking from leaky pipes
#9> While the park trees contained lead isotopes normally associated with air pollution, the street trees had isotopes found in lead water pipes, which were made with metal from geologically old deposits in nearby mines. I don't understand this part. We didn't use different sources of lead to make leaded gas and lead pipes, no?
When you need a lot of lead (enough to build plumbing for a neighborhood), you probably want to source it locally. When "1 part TEL to 1300 parts gasoline by weight is sufficient to suppress detonation",[1] you can source the lead from just about anywhere and ship it with the fuel. 1: https://en.m.wikipedia.org/wiki/Tetraethyllead
[deleted]
Re: Trees on city streets cope with drought by drinking from leaky pipes
#10> While the park trees contained lead isotopes normally associated with air pollution, the street trees had isotopes found in lead water pipes, which were made with metal from geologically old deposits in nearby mines. I don't understand this part. We didn't use different sources of lead to make leaded gas and lead pipes, no?
Tetraethyllead production was very centralized by Ethyl corp/DuPont and required a higher purity lead ore so their isotope ratios are very well known based on the deposits that they mined. More locally sourced lead used for construction will have different isotope ratios.