I agree with the spirit of your post (“The result of such widespread ownership of private property would be an unparalleled explosion in human wealth and well-being”) but not the content.
The main point is to get property into private hands. By doing so, wealth is created. I would not finesse such separate rights to water flows as the right to swim in it, or fish for trout, or to use the river for transportation, or to use the water for irrigation, or to use the water flows for generating electricity. Once a reasonable basis for claiming a river exists, all possible uses would accrue to the claimant. If he can’t make use of some aspect of his property, he can always rent it out or sell a right to use some aspect of his property.
The main point is to get property into private hands in a moral way. This is where you’re missing the point. If we just wanted to get property in private hands, the government could take all un-property and auction it off. But that would be immoral, because people are already using the un-property, and thus have legitimate property claims to its use. In other words, if you take it from them, you’re initiating force against them (and infringing their right to life).
Land property rights are dealt with this way. Generally, when you own your land, you can do whatever on it. Turn it into a nature preserve for furbish louseworts, or build a house on it, or a dump, or a road, or whatever. As long as you don’t violate the rights of your neighbors, you are free to do what you want with it. Generally, your property rights are not so narrowly defined that some uses are permitted and others belong to someone else. The exceptions are cases such as mining rights which, I would argue, are so unique that they arguably are a separate form of property right.
Landed property can only be used for one thing at one time. That is why it’s different. It’s fruitless to draw an analogy between water property and land property, as you’re doing, and say the former is just like the latter. Mining claims aren’t so unique - it’s just a case where landed property can be used in two different ways, just as water can be used in many ways, by different people, without infringing upon anyone’s usage/rights.
As for owning whales in the ocean, with modern technology that is feasible. I would argue that the ocean itself should be parceled and sold.
You can’t have both. What if my whales swim into your parcel? (I don’t want to talk about the specifics, though, I want to express my overall point and see if there are good objections to it.)
One would have the right to do whatever with his 100 X 100 mile plot of ocean.
See, that’s the thing. I already HAVE the right to do whatever I want, anywhere in the ocean. You’re trying to take that away from me.
Nothing destroys nature more than the lack of property rights, as the tragedy of the commons repeatedly attests throughout history.
My conception of property rights, in which a legitimate claim can be made upon a pod of whales (thanks for “pod,” btw, I was calling it a “herd” in ignorance), is the only way to save the whales, which you seem to be pretty big on. Dividing the ocean (or river) into parcels will not save schools of fishes. Point is, I agree with you that private property is the solution to saving natural resources. But you must use the correct definition of private property, the usage definition I’m advocating.