. . . I'd like to suggest the following links.
The first one is from a book by Lee Gurga, former editor of Modern Haiku, a quarterly magazine of haiku, senryu, & haibun.
http://www.baymoon.com/~ariadne/form/haiku/haiku.aesthetics.gurga.htm
The second one is from a haiku workshop held a few years ago at Eratosphere, a website where quite a few published poets post and critique each others poems and hold general discussions, etc. Lee Gurga was the guest who critiqued the haiku submitted for critique in the haiku workshop. And, by the way, he chose a few of those workshopped haiku for publication in Modern Haiku.
http://www.ablemuse.com/erato/showthread.php?t=5645&highlight=haiku+gurga
The third link takes you to the online version of Modern Haiku, giving you an indication of what's in the hard-copy, subscription version.
http://www.modernhaiku.org/
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P.S.
If you were to submit the "Drowning" haiku for critique, the first thing you're likely to be told is "I watched" is unnecessary. Remove the first two words because the poet's presence is taken for granted. Anyway . . .
Yours is a good idea for a haiku. Develop it further. Learn how to do so by checking out the three links above.
Best wishes!