In this study, the assessment of surface water quality of Oued Fodda dam was carried out by using the physicochemical and organic data recorded during the period from 2009 to 2016, which were measured monthly near the water intake in this dam. The basic parameters (pH, EC, TDS, O 2 , Mg 2+ , Ca 2+ , Na + , K + , Cl − , NO 3 − , HCO 3 − , SO 4 2− , BOD, COD, OM, NH 4 + ,NO 3 − , NO 2 − et PO 4 3− ) are used to determine organic water pollution and water quality for different uses, such as irrigation and industrial purposes. The evaluation of the suitability of surface water for irrigation purpose was done by the basic criteria such as sodium hazard (% Na), residual sodium carbonate (RSC), sodium adsorption ratio (SAR), and water quality index for irrigation (WQII). All these index methods indicate good water quality in this dam, which can be used to irrigate all kind of plants without real problem on agricultural yield rate, and without a problem of sodium and salinity hazards or permeability on the irrigated soils, mainly if an adequate drainage systems will be installed. The assessment of organic water pollution index (OWPI) indicates variation of water compounds concentration from month to another, that is due to multiple anthropogenic activities, and natural processes on upstream of this dam. The water passes from low pollution in the period of water inputs to moderate pollution in the period of reduction of water volumes in the dam. The fitness of water for industrial purpose by index methods (LSI and RSI) reveals an alternation between water quality from slightly to heavy corrosion (corrosion will proceed) unhindered by scale formation, generally, in the period of water inputs, and water quality of little scale forming with little to significant corrosion, which can be observed inside pipe, generally, from on the period of water volume decease.

中文翻译：

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地表水质评价指标方法：以阿尔及利亚西北部的 Oued Fodda 大坝为例

在本研究中，利用 2009 年至 2016 年期间记录的物理化学和有机数据对 Oued Fodda 大坝的地表水质进行了评估，这些数据在该大坝取水口附近每月测量一次。基本参数（pH、EC、TDS、O 2 、Mg 2+ 、Ca 2+ 、Na + 、K + 、Cl - 、NO 3 - 、HCO 3 - 、SO 4 2- 、BOD、COD、OM、NH 4 + 、NO 3 - 、NO 2 - 和PO 4 3- ) 用于确定不同用途的有机水污染和水质，例如灌溉和工业用途。地表水适宜灌溉的评价标准包括钠危害（% Na）、残留碳酸钠（RSC）、钠吸附率（SAR）和灌溉水质指标（WQII）。所有这些指标方法都表明该大坝的水质良好，可用于灌溉所有类型的植物，对农业产量没有真正的问题，也没有钠和盐分危害或灌溉土壤的渗透性问题，主要是如果安装了足够的排水系统。有机水污染指数 (OWPI) 的评估表明水化合物浓度逐月变化，这是由于该大坝上游的多种人为活动和自然过程。水从入水时期的低污染过渡到大坝水量减少时期的中等污染。通过指数方法（LSI 和 RSI）对工业用水的适应性揭示了水质从轻度腐蚀到重度腐蚀（腐蚀会继续）之间的变化，不受水垢形成的阻碍，通常，