Type Of Rainfall In Dry Areas
1. First type rainfall: Rainfall receives from south west Monsoon. Rainfall receives up to 60% in the first three months viz. June – July – August – Rontak Jodhpur Jalgaon.
2. Second type rainfall: Rainfall receives from south – West Monsoon (40 to 55%) and supplemented with North East Monsoon (40 to 50%) Pune. Wal A Nagar Raichur – Maximum rainfall receives in July & Sept.
3. Third type rainfall: Rainfall receives from North East Monsoon (60%) Solapur Bijapur a Karnataka.
4. Four type rainfall: Rainfall receives uniformly (Well distributed) from Both Monsoon currents, places of rainfall – Chennai. Total rainfall received in 5 to 6 months.
Decennial rainfall: The mean total rainfall received during past 10 years:
Winds coming over land surface from the North – East are dry and cold and man cause of breaks in the monsoon or they tend to decrease the rainful of a tract by diluting the moisture laden masses of the atmosphere. Indian be divided into three zones of the basis of rainfall.
A) Heavy rainfall zone: above 1250 mm.
B) Moa crate rainfall zone: 750 to 1250 mm.
C) We rainfall zone: Less than 750 mm annual rainfall.
The average rainfall of Solapur varies from 500 to 720 mm and had bimodal stribution. The first peak is usually experienced during June and Second during Sept. Rainfall during Sept. is more assured and is in the rage of 150 to 200 mm. Even though Monsoon sets in by the end of June, July and August are characterized by dry spells of varying duration (2 to 8 weeks at stretch) and frequencies 1 to 5. Usually dry speels of more that 4 weeks duration or 3 dry spells of 2 week duration result in failure off Kharif crops. Such occasions are observed twice in fire years. Usually high wind velocity (18 to 20 km / hr)
At Solapur under dry land areas year to year fluctuatins are so much that there is no guarantee of a fixed quantity of rainfall. Generally rainfall starts in late June to early July. There is depression during late July to early August. Again there is good amount of rainfall in last Aug. and Sept. The rainfall totally recedes by mid October. This is the usual pattern of rainfall in draught prone areas. The probability of rainfall is more than half the normal is fairly good. (P = 0.58) during September.