Paparoa national park
Sir.—D. H. Pearson (March 30) states that "at no time or place does the Ananui Creek run through the main Nile Caves.” As I was largely responsible for the original systematic exploration and mapping of the caves I feel I should comment. Ananui Creek joins the main cave system approximately 230 m from the main (northern) entrance, and flows through passages for another 650 m before debouching into the Nile River from the base of cliffs. There is evidence that flooding occurs up to roof level in the stream passages and that water on occasion backs up along connecting tunnels to points close to the levels of “dry” passages containing stalac-
tites and stalagmites. Any increase in erosion and consequent silting in the valley of the Ananui Stream could increase the flood level. It is important that the possibility of increased erosion after removing part of the forest cover in the headwaters of the stream be carefully investigated before milling be allowed.—Yours, etc., M. G. LAIRD. March 30, 1979.
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Press, 2 April 1979, Page 18
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172Paparoa national park Press, 2 April 1979, Page 18
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