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22 00'3'" the water to the edge of the service area. Accretions to the Arkan- sas River between Garden City and the diversion point would average about 27,000 acre-feet annually. This river gain, to the extent it could be utiliZed without regulation, would augment the reservoir releases for irrigation use. The area is shown on exhibit 5. Pawnee River-Walnut Creek areas In the Pawnee River and Walnut Creek drainage areas irriga- tion from surface water sources is quite limited. In 1950 about 3,500 acres were irrigated served largely from individual diver- sions, stream side pumps, and farm ponds. The average annual runoff in Pawnee River was about 65,000 acre-feet and Walnut Creek about 32,000 acre-feet for the period 1926 to 1958. However, the stream flow is so erratic as to preclude extensive increase in irrigation use without considerable storage. If storage facilities are pro- vided, as previously discussed, some expansion of irrigation in the Pawnee Hi ver and Walnut Creek Basins could be made. The relationship of storage sites and possible service areas is shown on exhibit 6. In the Pawnee River drainage below Burdett are upwards of 30,000 acres of alluvial lands in fairly compact and continuous bodies. Soils are predominantly silty loam of good depth and are capable of high productivity. Irrigation could be accomplished either by gravity diversion or pumping from the stream. It is possible that an inte- grated system utilizing ground and surface Waters could be advantageous. Below Bazine in the Walnut Creek Qrainage are over 50,000 acres of highly productive land that appears to be suitable for irrigation. Parts of this land auld be irrigated by diversion from the stream. Here too, it may be advantageous to integrate surface and ground water uses.