Evaluation of the quality of the water of the river Cunas physiochemical and biological indexes, Junín - Perú

Abstract

Objective: To evaluate the quality of the water of the river Cunas physiochemical and biological indexes in order to identify the areas with good conservation state, between January of 2013 and December of 2013. Methods: The observation methods, description and explanation, the non-experimental design of longitudinal type were used. They were defined three sampling sectors, in Angasmayo (Concepción), Huarisca (Chupaca) and Pilcomayo (Huancayo). The samples of water were collected in bottles of plastic of two liters and in sterile glass flasks to determine the concentration of nitrates and phosphates, and coliformes termotolerantes, respectively. The parameters measured in situ were: dissolved oxygen (mg/l), dissolved total solids (mg/l), temperature (°C), pH and turbidez (FTU). These mensurations were carried out with portable teams Hanna Instruments. The samples of benthic macroinvertebrates were collected by means of a net Surber with mesh of 250 μm of opening. Results: according to the INSF, Angasmayo presented quality of good water (75,14 in rain time; 74,23 in low water), Huarisca half quality (67,96 in rain; 65,22, in low water) and Pilcomayo half quality (61,39 in rain; 55,82 in low water). According to the index EPT, Angasmayo revealed good quality of water, Huarisca to regulate quality and Pilcomayo bad quality of water. Conclusions: In Angasmayo, the masses of water so much in rain time as in low
water they qualified like water of good quality. In Huarisca they qualified like water of half quality or to regulate and in Pilcomayo, like water of half quality (according to INSF) and of bad quality (according to EPT).