D.—l

TABLE No. 6— continued. IRRIGATION AND WATER-SUPPLY— continued. Schedule of Schemes under Investigation.

22

Main Canals River Discharge Average Rainfall Tiamfaii Area Length of Length of, Expenditure Sciieme. Source of Supply. Discharge (Maximum), from -. commanded Main Distribu- to 31st Remarks. (Minimum). as per Records available. j (Gross). Canal. taries. | March, 1935. Design. Canterbury South — Cusecs. Cusecs. Inches. Inches. Acres. Miles. Miles. £ Investigations of pro- .. .. .. .. .. .. .. .. 6,425 Investigations into the feasibility and cost of posed schemes irrigation in this area have been in hand since January, 1934, and a topographic survey completed over an area of 1,033,400 acres. Investigations include the following phenomena, viz : Soil moisture, mechanical analysis of soil, depth of ground water, evaporation, Otago Central — rainfall, and river-flow Chapman's Gully .. Conroy's Creek and stor- 3 .. 13-72 13-83 580 .. .. .. Portion now served by private races. age dam (Alexandra) Cromwell Flat and Low- Hydro-electric develop- 29 .. 20-42 21-29 .. .. .. 3,774 Hydro-electric scheme under investigation, burn (Roaring Meg) ment of Roaring Meg (Roaring (Luggate) Power would be available for pumping irngaand pumping from Meg) tion supplies to 8,000 acres in Upper Clutha Clutha and Kawarau Valley. Portion of this area could be supplied Rivers from Hawera River power and pumping scheme. Maniototo (Upper Taieri) Taieri River and storage 25 500 16-95 16-90 100,000 60 .. 13,473 Modified scheme for complete irrigation of dam (Waipiata) 5,000 acres is possible without storage, or for reasonable partial irrigation of 15,000 acres. Surveys practically complete for scheme to irrigate 100,000 acres. Scandinavian .. Tributaries of Manuheri- .. 20 30-60 33-07 .. . . .. For lands about St. Bathan's. To bear £15,000 kia River (St. Bathan's) towards cost of Falls dam, Upper Manuherikia scheme. Irrigable area, 3,000 acres. Upper Clutha Valley (in- Hawea and Clutha Rivers 580 .. 21-67 23-05 .. .. .. . . Investigations have been made for a hydroeluding Hawea Flats) (pumping) with power- (Hawea R.) (Hawea Flat, Lug- electric power development at the outlet of station at outlet of 3,000 gate, and Tarras) Lake Hawea. Sufficient power would be Lake Hawea (Clutha R.) available to pump water from the Hawea and Clutha Rivers to 13,700 acres in the Upper Clutha Valley. Upper Manuherikia (ex- Manuherikia River and 36 .. 20-35 21-29 16,000 58 60 6,553 Surveys and investigations have been made for tension of Omakau storage dam at Manu- (at dam- (Clyde, Ophir, and the extension of the Omakau scheme (now Scheme) herikia Falls site) (Blackstone Hill) under construction) to supply lands between Tiger Hill and Clyde. Irrigable area, 12,000 acres. Investigation of proposed .. .. .. .. .. .. .. 7,535 Includes the reading of river and rain gauges, schemes 1 Total: Schemes under investigation .. .. .. .. .. .. .. .. .. .. .. 37,760 Grand total .. .. .. .. .. .. .. .. .. .. .. .. .. 1,290,779