本文就某湖泊的整治作一阐述，较详细说明水下地形与淤泥厚度测量原理及方法。

This paper discussed the renovation of a lake and expatiated the principle and methods of surveying on underwater topography and sludge thickness.

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通过对不同厚度淤泥水中氮营养盐的测定和分析，初步研究了不同厚度淤泥对水族箱水质环境中氮营养盐的影响。

This paper deals with the influence of a humus layer of different thicknesses on the water quality environment by measuring and analyzing the concentration of nitrogen nutritional salts.

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