Climate change has a negative impact on surface water quality. This is influenced by the increase in human activities in the use of water. The resulting water output is discharged directly into water bodies and can increase the pollutant load of river water. One of the recipients of the burden of surface water pollution is the Larangan/Premulung River, which is indicated to have decreased quality due to liquid waste originating from domestic, industrial, and agricultural activities. The purpose of this study was to determine the load carrying capacity of water pollution in the Larangan River in the upstream, middle, and downstream parts. The water samples taken amounted to 10 sample points. The data was collected in the form of physical parameters (flow rate, water temperature, and TSS) and chemical parameters (pH, COD, BOD, and DO). The method of calculating the carrying capacity of the pollution load uses the mass balance method. Data analysis used quantitative descriptive analysis. The results showed that the carrying capacity of the Larangan/Premulung River pollution load: (1) the upstream part could no longer accept the pollutant load in the moderate to the heavy category in the quality standard class II; (2) the middle and downstream parts for COD and BOD parameters are no longer able to accept the pollutant load in the medium to large category.

Climate change can pose major risks to human health, global food security and economic development. The negative impact is an increase in the rate of erosion in agricultural land areas. Ngargoyoso District, Karanganyar Regency is one of the areas that have a high erosion rate. Land conservation to control the rate of erosion with a community participatory approach is carried out to realize sustainable agricultural land. The purpose of the study is to determine the level of erosion hazard in Ngargoyoso District. This research is in the form of a case study, using direct data collection methods (surveys) and laboratory tests. Analysis of the data on the level of erosion hazard (TBE) using the USLE calculation approach. The research variables were rainfall erodibility, soil erodibility, slope length and slope, crop management, and land management. The results showed that in the District of Ngargoyo: 1) areas with a very heavy level of erosion hazard covering an area of 500.66 hectares spread over Kemuning Village, Ngargoyoso Village and Nglegok Village; 2) Agricultural activities greatly affect the level of erosion hazard in the study area