Machhu river rises in the hills of Jasdan near village Khokhara in Chotila taluk of Surendranagardistrict at an elevation of 220 m above m.s.l. This is one of the North flowing rivers of Saurashtra in Gujarat state. The Machhu basin is situated between 22 o 10 to 23 o 10’North latitude and 70 o 40’to 71 o 15’East longitude. The river Machhu originates from the hill ranges of Jasdan :Sardar and Mandva in Rajkot district and Chotila in Surendranagar district and flows in north westerly direction alongwith the district boundary of Surendranager and Rajkot upto village Beti and then flows mostly towards north in Rajkot district and finally disappear near Malia in the little Rann of Kachchh. Machhu alongwith its tributaries flows 52% in the hilly area and 48% in plain region. The river fertilise Malia, Morbi, Wankaner, Jasdan and Rajkot taluks of Rajkot district and part of Chotila talum kin Surendranagar district. Machhu drains an area of 2515 sq/km. out of which more than 75% lies in Rajkot district.

The district wise distribution of drainage area is shown below:

Total length of this North Flowing river from its origin to its outfall into the little Rann of Katchch is 114.75 km. The Machhu receives several tribuatires on both the banks. There are 6 major tribuatires having length more than 25 km. out of which 4 tributaries namely Jamburi, Benia, Machhori and Maha feed from the right and the remaining 2 tributaries namely Beti and Asoi from the left. The drainage system on the right bank of Machhu is mor extensive as compared to the left bank. The Beti, Asoi, Machhori and Maha, the 4 important right bank tributaries together account for nearly 42.52% of total catchment area of Machchu. Maha, which is the principal tributaries , rises from Rampura in Choitila taluk of Surendranagar district and drains in North Western direction and fertile Surendranagar and Rajkot districts and joins main stream Machhu about 1.6 km downstream of Panchaisa village.

Machhori the another important tributary also rises from Chotila taluka and drains towards North direction and mets the main stream about 8.5 km downstream of Wankaner in Rajkot district. Asoi tributary rises from the hilly regioin of village Wanjhara of Taluka and drains towards North direction and meets the main stream just upstream of village Derali. The catchment area, length and elevation of sources of important tributaries are indicated below: