A digital terrain model of the Strzelin granite quarry was created from ISOK project data obtained from airborne laser scanning (ALS). Based on 2009, 2012, and 2014 data, the volume of water in the Strzelin quarry’s two excavations were determined. Additionally, the predicted volume of retained water after mining ceases was calculated, assuming a water level of 150.0 m a.s.l. In 2014, the two reservoirs retained, respectively, ≈ 0.14 and 0.01 million m³ of water. If the two pits are eventually connected, ≈ 6.6 million m³ of water could be retained. Including the 2014 water volume as a small-scale retention basin would increase the volume of retained water in the Ślęza catchment and Strzelin County by 19.0%, and 34.2%, respectively. The hypothetical reservoir created after mining ends would increase small-scale (reservoir and pond) retention ≈ 8 times in the Ślęza catchment and ≈ 15 times in the County, constituting a significant improvement. 依据从ISOK项目获取的航空激光扫描(ALS)数据建立Strzelin花岗岩采石场的数字地形模型。基于2009、2012和2014年ALS数据,估算了Strzelin采石场两个采坑内积滞留水体体积。另外,假定水位标高150m,计算了采石场停产后采坑蓄水体积。在2014年,两个采坑水库滞留水量分别约0.14×10⁶m³和0.01×10⁶m³。如果两个采坑水库最终相连,库容将达6.6×10⁶m³。如果将2014年采坑滞留水量作为小规模滞水盆地,它将使Ślęza流域和Strzelin县滞水体积分别增长19.0%和34.2%。采后矿坑水库将分别显著增加Ślęza流域和Strzelin县小规模滞留水量8倍和15倍。 Ein digitales Geländemodell des Strzelin Ganitsteinbruchs wurde mit ISOK Projektdaten erstellt, welche aus Airborne-Laserscanning-Daten generiert wurden. Basierend auf Daten aus den Jahren 2009, 2012 und 2014 wurde das Wasservolumen der beiden Restlöcher des Strzelin Steinbruchs bestimmt. Zusätzlich wurde der vorhergesagte Restsee nach Einstellung des Steinbruchs unter der Annahme eines Wasserspiegels von 150,0 m über dem Meeresspiegel (Pegel Kronstadt) betrachtet. Im Jahr 2014 hatten die beiden Restseen ein Volumen von 0,14 bzw. 0,01 Mio. m³ Wasser. Für den Fall, dass die beiden Restseen verbunden wären, könnten 6,6 Mio. m³ Wasser gespeichert werden. Unter Einbeziehung der Wasservolumina der Restseen aus 2014 als zusätzlichen Wasserspeicher würde sich das Rückhaltevermögen des Ślęza Einzugsgebiets um 19% und des Strezliner Landkreises um 34,2 % erhöhen. Das geschätzte Speichervolumen nach Bergbauende würde die kleinräumige Retention (Reservoir und Teich) im Ślęza Einzugsgebiet um das 8-fache und im Landkreis um das 15 fache erhöhen. Se creó un modelo digital de terreno de la cantera de granito Strzelin a partir de datos del proyecto ISOK obtenidos del escaneo láser aéreo (ALS). Con base en los datos de 2009, 2012 y 2014, se determinó el volumen de agua en las excavaciones de la cantera Strzelin. Además, se calculó el volumen previsto de agua retenida después que la minería se detuviera, suponiendo un nivel de agua de 150,0 m arriba del nivel del mar. En 2014, los dos reservorios retuvieron ≈0,14 y 0,01 millones de m3 de agua, respectivamente. Si los dos pozos fueran conectados, podrían ser retenidos ≈6,6 millones de m3 de agua. Incluir el volumen de agua 2014 como una cuenca de retención a pequeña escala incrementaría el volumen de agua retenida en la cuenca Ślęza y en el condado Strzelin en 19,0% y 34,2%, respectivamente. El hipotético reservorio creado después de la finalización de la minería incrementaría la retención a pequeña escala (reservorio y estanque) ≈8 veces en la cuenca Ślęza y ≈15 veces en el condado, constituyendo una mejora significativa.

The study presents the legal requirements concerning the quality of wastewater discharged to waterbodies and to soil after treatment in household wastewater treatment plants located in agglomerations or outside them. The procedure of stopping the operation of a household treatment plant that doesn’t meet the statutory wastewater treatment efficiency was presented. The decision ordering to stop the use of a household wastewater treatment plant has to be preceded by a decision ordering to take measures to limit its adverse impact on the environment. The clarification procedure has to determine the adverse impact on the environment in a doubtless manner and it has to be reflected in the documentation. The assessment of adverse impact should take into account the binding standards of use of the environment. Stopping the operation of a household wastewater treatment plant may result in issuing a decision ordering the user to connect to the sanitary sewage system.

The paper presents the evaluation of the possibility to use water from five quarry lakes located in County Strzelin for the purposes of agricultural irrigation. The evaluation was based on the guidelines provided by FAO and in PN-84/C-04635. The average values of water quality indicators were as...

This paper presents the results of bathymetric measurements of quarry lakes located in inactive granite quarries (Poland, Lower Silesia, County Strzelin), which were used, among other reasons, to determine the surface area, depth, and volume of water retained in the analysed quarry lakes. The usability of water in quarry lakes for agricultural irrigation was also assessed, based on the FAO Guidelines and the PN-84/C-04635 standard. The average surface area of the analysed quarry lakes was 0.99 ha, the average depth was 6.0 m, and the maximum depth was 14.3 m. At the same time, the total volume of the retained water amounted to 307.8 thousand m³, which accounts for 10.6% of the retention capacity of water reservoirs situated in the catchment of the Oława River. The average values of water quality indicators were as follows: electrical conductivity—0.332 mS × cm⁻¹; sodium adsorption ratio—0.56; total dissolved solids—212.4 mg/L; water pH—7.8; BOD₅—2.4 mgO₂/L. The mean concentrations of ions had the following values: nitrates—0.91 mgN-NO₃⁻/L; sulphates—176.3 mg SO₄²⁻/L; chlorides—36.56 mg Cl⁻/L; sodium ions—14.8 mg Na⁺/L; calcium—41.3 mg Ca²⁺/L; magnesium—7.48 mg Mg²⁺/L; manganese—0.1 mg Mn/L; and iron—0.01 mg Fe/L. The concentrations of water quality indicators that were recorded for the analysed Strzelin quarry lakes were similar to those observed in natural lakes and uncharged water bodies. Water from the analysed quarry lakes met (with some minor limitations) the requirements that enable them to be used for agricultural irrigation. The volume of the water retained in the analysed quarry lakes constitutes an important element of the total balance of water retained in all the reservoirs, ponds, and all Strzelin quarry lakes situated in the catchment of the Oława River, accounting for 10.6% of the total volume of retained water. The article presents the innovative concept of the possibility of using water from quarry lakes in agriculture, based on their quantity and quality and the requirements for the purpose for which they will be used, e.g., for agricultural irrigation.

This paper presents the results of an analysis of the pace of filling one of the deepest European granite quarries with water. A DTM (digital terrain model) based on data from LiDAR ALS (light detection and ranging airborne laser scanning) was used to create a model of the pit of the Strzelin I granite quarry and to determine the reach and surface area of the direct catchment of the excavation pit. The increase in the volume of water in the excavation pit was determined. Analogue maps and DTM were used to calculate the maximum depth of the pit (113.3 m), its surface area (9.71 ha), and its capacity (5.1 million m³). The volume of water collected in the excavation pit during the years 2011–2018 was determined based on the analogue base map and the DTM. The result was 0.335 million m³. Based on the data made available by the mining company, the correlation of the DTM with the orthophotomap of the mining area and additional field measurements, the ordinates of the water level in the years 2011–2018 were determined. Initially, the water surface level in the quarry was located on the ordinate of 66.6 m a.s.l. (July 20, 2011). After the pumping of water was discontinued, the level rose to 96.1 m a.s.l. (January 28, 2018). The increase in the water volume in the quarry pit during specific periods was determined (actual retention increase). The obtained data on the volume of the retained water referred to the period during which it accumulated in the quarry. On average, the net increase in water retention in the excavation pit was 138.537 m³∙d⁻¹, and the calculated net supply from the direct catchment (16.04 ha) was 101.758 m³∙d⁻¹. The use of DTM and measurements of the water level in the excavation pit seem to be an efficient means of estimating the pace of spontaneous filling of the quarry with water supplied from the direct physiographic catchment.

The paper presents the results of the analysis of the volume of water retained in Strzelin Quarry Lakes (SQLs). The volume of retained water was estimated by using the computational method, where the proposed reduction factors were determined with the use of DTM (digital terrain model). 2.6 hm³ of water was retained in seventeen Strzelin Quarry Lakes, of which 1.2 hm³ in the Ślęza River catchment (3 quarry lakes), and 1.4 hm³ in the Oława River catchment (14 quarry lakes). The obtained data of the volume of water retained in SQLs were compared to the balance of the water retention capacity of water reservoirs in the catchments of the Ślęza River (0.809 hm³), part of the WR08 Bystrzyca balance catchments (16.190 hm³) and in the catchments of the Oława River (2.782 hm³), part of the WR09 Nysa Kłodzka balance catchment (104.960 hm³). Inclusion the volume of water retained in Strzelin Quarry Lakes in the small scale water retention (reservoirs and ponds) balance would increase the volume of retained water by 156.0% in the Ślęza catchment (by 7.8% in the WR08 Bystrzyca balance catchment) and by 49.5% in the Oława catchment (by 1,3% in the WR09 Nysa Kłodzka balance catchment). Under favorable hydrogeological and geomorphological conditions water reclamation of the excavations may be one of the main aspects of increasing the retention capacity of the catchment, what is particularly important in areas characterized by low water resources.