Characteristics of Spatial Distribution of Phosphorus and Nitrogen in the Bottom Sediments of the Water Reservoir Poraj

Abstract

The aim of this study was to determine the content of phosphorus and nitrogen in the bottom sediments of the Poraj Reservoir located on the Warta River, along with defining their spatial distribution and the relationship between these elements and organic matter, aluminum and iron. Samples of bottom sediments were collected on the basis of regular measurement grid of 46 points located in the area of the water reservoir Poraj. The collected samples were analyzed in terms of content of following elements, which values are in range: total phosphorus (TP) 0.06 -5.06 g/kg, total nitrogen (TN) 0.17 -9.66 g/kg, organic matter (OM) 0.49 -28.41% of solid content, aluminum (Al) 2.44 -145.15 g/kg and iron (Fe) 0.28 -16.50 g/kg. By using of GIS system, spatial distribution of obtained results of laboratory analyzes were interpolated (Inverse Distance Weighted method was used). On basis of spatial distribution it was noted that in northern part of water reservoir bottom sediments have greater values of TP, TN and OM than in southern part. The study also included calculation of correlation between: OM and TN (n=46, R 2 = 0.9335), TN and Fe (n=46, R 2 = 0.8782), TN and Al (n=46, R 2 = 0.8629), OM and Fe (n=46, R 2 = 0.8243), OM and Al (n=46, R 2 = 0.7981), TP and Fe (n=46, R 2 = 0.7456), TP and Al (n=46, R 2 = 0.6209). The presented pilot studies show that the potential content of phosphorus, nitrogen and organic matter in the sediments of the water reservoir Poraj can reach a significant level. The need to plan and carry out further research allowing the evaluation of the properties of the analyzed elements and examining their potential impact on water quality in the tested water reservoir was stated.

Evaluation of Quality of Bottom Sediments of Water Reservoir Poraj by Applying Sediment Quality Guidelines and Spiatal Analysis

“…It was created in 1978 in order to build a reservoir of water for Huta Czestochowa. Currently, it is the subject of interest to local residents because it could be used for water sports and tourism, as well as recreation in the region [2,14,15,16]. The Warta River is the main tributary directly supplying the Poraj water tank.…”

“…1. The research material was collected using a specialized hook for bottom sediments of Van Veen's KC Denmark type [2,14].…”

“…The samples were first dried under dry-air conditions and then sieved through a 2 mm screen. They were then dried in an oven at 105°C to constant weight and ground in a vibrating mill until the grain size was lower than 0.2 mm [2,14].…”

“…The main aim of this study was to evaluate the quality of bottom sediments of water reservoir Poraj by applying a set of sediment quality guidelines, potential ecological risk and spatial analysis. Toxicity effect and total trace element content were described in previous studies [2,14].…”

Analysis of Toxicity of Bottom Sediments of Water Reservoir Poraj in Terms of Heavy Metals Contamination

“…Do cytowań -For citation: Rozpondek, K., Rozpondek, R., Pachura, P. (2017). Analiza toksyczności osadów dennych zbiornika Poraj w aspekcie stopnia zanieczyszczenia metalami ciężkimi.…”