Sagar Island in Indian Sundarbans is bestowed with numerous tidal creeks providing a suitable home to its inherent aquatic biota. The present study investigated the variation in the surface water quality in selected tidal creeks of Sagar Island, Indian Sundarbans to understand the present status of water quality for wildlife propagation and fisheries. Ten water parameters were taken into consideration for analysis on monthly basis from four stations (tidal creeks) from September 2015 to August 2016. One-way ANOVA showed five parameters (water temperature, salinity, dissolved oxygen, turbidity and chemical oxygen demand) varied significantly between seasons (p ≤ 0.05). Factor analysis exhibited four factors explaining 53.21% total variance in the observed data. Salinity and turbidity showed a maximum annual range of variations followed by dissolved oxygen. The fluctuations of physicochemical parameters throughout the year hinted toward the ever-changing nature of the estuarine ecosystem with possible human-induced impacts. Pronounced variation in turbidity seemed to be the effect of ferrying/transportation, monsoonal runoff and other human-induced activities. In the present study, water parameters viz., water temperature, dissolved oxygen and turbidity were the deterministic parameters influencing the variables in the system. The other important parameters were found to be COD, BOD₃ and nitrate concentrations during the study period. The study shall provide baseline information in formulating the management measures in terms of water quality in wildlife propagation and fisheries.

印度Sundarbans的萨加尔岛（Sagar Island）拥有众多的潮汐小溪，为其固有的水生生物群落提供了合适的住所。本研究调查了印度Sundarbans萨加尔岛某些潮汐小溪的地表水质量变化，以了解野生动物繁殖和渔业用水质量的现状。从2015年9月至2016年8月，从四个站点（潮汐小溪）每月考虑10个水参数进行分析。单向方差分析显示5个参数（水温，盐度，溶解氧，浊度和化学需氧量）显着变化季节之间（p ≤0.05）。因子分析显示了四个因子，这些因子解释了观察到的数据中53.21％的总方差。盐度和浊度显示出最大的年度变化范围，其次是溶解氧。全年理化参数的波动暗示着河口生态系统的不断变化的性质，可能会受到人为因素的影响。浊度的明显变化似乎是轮渡/运输，季风径流和其他人为活动的影响。在本研究中，水的参数即，水温度，溶解氧和浊度是影响在系统中的变量确定性参数。发现其他重要参数是COD，BOD ₃和研究期间的硝酸盐浓度。该研究应提供基线信息，以制定关于野生动植物繁殖和渔业中水质的管理措施。