Mixed Up About Pressure & Potential. Garden Areas
Situation: Irrigating two zoned garden areas. Dimensions 5 x 125 feet and 15 x 100 feet. Planning on using a gas powered Honda VX10 portable water pump from a creek source 35 feet below garden areas. Electric power out of the question...too far. Other pump types not feasible..creek flow slow and no drop offs.
According to Honda I will get 15 psi at the head with a flow of 35 gallons per minute. The 5 x 125 area slopes downward from the head about 10 feet. The other area remains flat. I was planning on a T connection at the head to irrigate the two areas separately, thinking I don't have enough pressure to try it all at once.
Looking to run bubblers or micro sprayers in the two separate lines spaced accordingly(depends on potential). I realize the more outlets the more the pressure drops. What has me baffled, and it's probably quite simple...Will the pump be affected if I have too much pressure on it? In other words, it says 35 gpm, but let's say the irrigation system is set up where only 10 gpm comes out. Too much stress on the pump? It will probably only be used 1-2 times per week June to September for an hour each time.
Btw, maybe I may thinking into this too much as the pump does have a throttle. It's probably a test, test and test scenario, but thought someone could make it simple..or is it simple?
Lastly, a cistern has been considered for a gravity irrigation system but I'm hoping to get around it(another reason why I am here). Can anyone point me in the direction in what to use in so far as type of system..ie.coils, heads etc. Yes each and every situation is subjective...but thanks in advance.