TABLE 2 in Two new genera and species of the valvatiform hydrobiid snails (Caenogastropoda: Truncatelloidea: Hydrobiidae) from Morocco

TABLE 2. Measured physico-chemical parametres for the studied springs. Measurements are taken on 7 April 2022; for the spring S3: 9 April 2022. T°C: water temperature; TDS: Total Dissolved Solids; DO: Dissolved Oxygen. The preferable level of TDS in water (WHO): Good: TDS=300–600 milligrams per litre: P1, P2 and P3 unacceptable: TDS above 1200: P4 also with high conductance. Wellswell protectionwater usePiezometric level (m)Depth (m)Opening diameter (m)T °CpHDO (mg/l)Conductivity (µS/cm)TDS (mg/l)Salinity (ppt)P1with a metal coverdrinking water and domestic use3.406.209016.018.0410.59594780.48P2rudimentary protectionagricultural irrigation use8.5018.51.4017.078.019.17173590.35P3with a metal coverdrinking water, ablution and domestic use7.16391.7017.668.2515.68334170.41P4with a metal coveragricultural and construction use10.30212.0420.487.9914.8285414251.48表2 研究泉眼的实测理化参数。本次测量于2022年4月7日完成，其中S3泉眼的测量时间为2022年4月9日。文中参数缩写说明如下：T°C代表水温；TDS为总溶解固体（Total Dissolved Solids）；DO为溶解氧（Dissolved Oxygen）。世界卫生组织（World Health Organization）推荐的水体TDS适宜标准为：良好等级对应TDS 300~600毫克/升；P1、P2、P3不符合水质要求，当TDS超过1200毫克/升时对应P4等级，且P4同时伴随高电导率。 各泉眼的详细参数如下： | 泉眼编号 | 水井防护措施 | 用水用途 | 测压水位（m） | 深度（m） | 开口直径（m） | 水温（T°C） | pH值 | 溶解氧（DO，mg/L） | 电导率（µS/cm） | 总溶解固体（TDS，mg/L） | 盐度（ppt） | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | P1 | 带金属防护盖 | 饮用水及生活用水 | 3.40 | 6.20 | 0.90 | 16.0 | 8.04 | 10.59 | 594 | 780 | 0.48 | | P2 | 简易防护 | 农业灌溉用水 | 8.50 | 18.5 | 1.40 | 17.07 | 8.01 | 9.17 | 1735 | 90 | 0.35 | | P3 | 带金属防护盖 | 饮用水、净身及生活用水 | 7.16 | 39 | 1.70 | 17.66 | 8.25 | 15.68 | 334 | 170 | 0.41 | | P4 | 带金属防护盖 | 农业及建筑用水 | 10.30 | 21 | 2.04 | 20.48 | 7.99 | 14.82 | 854 | 1425 | 1.48 |