“死水塘”指平时没有来水(主要靠雨天集水)或来水为生活污水等缺氧性水质的山塘或门前塘,这些塘的特点:1、由于雨水冲刷,水土流失,水质易变浑浊和产生较多塘泥。2、来水不便,水质较易老化,造成水中溶解氧下降,影响鱼类生长,严重造成浮头、泛塘。3、秋冬干旱,池塘水位下降,成鱼 “Dead Pool” refers to ponds or front ponds which are usually without incoming water (mainly collecting rainy days) or incoming water such as domestic sewage. The characteristics of these ponds are as follows: 1. Due to rainwater erosion, soil erosion, water quality Variable muddy and produce more pond mud. 2, water inconvenience, water quality is more aging, resulting in decreased dissolved oxygen in water, affecting the growth of fish, causing a serious floating head, Pan Tong. 3, autumn and winter droughts, pond water level decline, into fish