Kabupaten Sleman memiliki banyak daya tarik yang memicu terjadinya urbanisasi yang dapat terlihat dari fenomeno perubahan penggunaan lahan . Perubahan penggunaan lahan di Kabupaten Sleman terjadi pada kawasan keamanan dan ketahanan pangan yang terdiri dari Kecamatan Moyudan, Minggir, Sayegan, Godean, Mlati, dan Tempel.  Fenomena perubahan penggunaan lahan penting untuk dikontrol dan dikendalikan karena kawasan tersebut memiliki peran penting bagi ketahanan pangan di Kabupaten Sleman. Metode penelitian yang digunakan adalah metode deskriptif. Di dalam metode deskriptif terdapat metode survey yang digunakaan untuk mengetahui kondisi eksisting penggunaan lahan di daerah penelitian. Sedangkan untuk perubahan penggunaan lahan pada kawasan keamanan dan ketahanan pangan di Kabupaten Sleman dari Tahun 2012 sampai Tahun 2018 diperoleh dengan metode overlay peta penggunaan lahan yang diperoleh dari Citra Quickbird pada tahun tersebut. Perubahan penggunaan lahan pada kawasan keamanan dan ketahanan pangan Kabupaten Sleman mencapai 57,33 km2 atau 33,93% dari luas total daerah penelitian. Perubahan penggunaan lahan didominasi oleh perubahan lahan sawah menjadi hutan produksi seluas 15,05 km2. Faktor pendorong adanya perubahan penggunaan lahan tersebut adalah produktivitas pertanian sawah yang semakin menurun tiap tahunnya.Sleman Regency has many attractions that trigger urbanization which can be seen from the phenomenon of land-use change. This phenomenon occurs in Sleman Regency particularly in the area of food security and sustainability which is spreading in various districts such as Moyudan, Minggir, Sayegan, Godean, Mlati, and Tempel. The phenomenon of land change must be managed and controlled because the areas have an important role for food security in Sleman Regency. The method used for the research is descriptive method. Survey is a part of descriptive method which used to determine the existing conditions of land use in the research object areas. Whereas for land-use changes in the area of food security and sustainability in Sleman Regency from 2012 to 2018 was obtained with the method of land-use map overlay obtained from Quickbird imagery in those years.Land-use change in the area of food security and sustainability of  Sleman Regency reaches 57.33 km2 or 33.93% from the total of research study area. Land-use change is dominated by the diversions of rice fields to forests that reach 15.05 km2. The driving factor for this phenomenon is the decreasing annual productivity of rice field.

ABSTRACT

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There is an increasing need for clean water because of the growing population. However, the amount of clean water is decreasing due to poor water resource management. Several textile industry processes result in waste. Color, alkalinity, high TSS, high BOD, and some dyes are known to contain chromium elements and are all common characteristics of liquid waste produced by the textile industry. The goal of this study was to assess the performance of textile waste treatment units in Pringsurat Subdistrict, Magelang Regency, Central Java Province, as part of an effort to reduce river water pollution. Quantitative and qualitative methods were used including through surveys and mapping. Groundwater flow maps, and river water and wastewater levels of BOD, COD, TSS, phenol, chromium, ammonia, and sulfide were used as primary data. Unpleasant odors and discoloration of the river were observed. It is recommended that, to reduce the impact of the wastewater, a constructed wetland with a combination of two types of plants, Iris pseudacorus and Thypa angustifolia, should be used. Keywords: Pollution Control, River Pollution, Textile Industry, Wastewater treatment, and Wetland

Sidoarum Village, Godean District, Sleman Regency, Special Region of Yogyakarta become one of the developing areas for getting influenced by Yogyakarta City center which is only 8 kilometers away. Population growth has occurred from 2010 to 2019 which has led to land use changes from agricultural areas to residential areas. Land use change, population growth, incorrect space using, excessive use of fertilizers, agricultural activities, and industrial waste disposal affects the groundwater quality resources, especially nitrate (NO3) compound. This research was aimed to determine the distribution of groundwater quality based on nitrate parameters and to analyze the relationship between land use changing and nitrate concentrations in groundwater. This mixed-method research used to survey and mapping methods to collect the data. The analysis was conducted by laboratory tests and spatial analysis method using Arc GIS software. The sampling of groundwater was carried out by purposive sampling method based on differences in land use. The results indicated that most of the groundwater in Sidoarum Village has been contaminated by nitrate due to activity in agricultural areas like intense fertilizer application and farming in household-scale in densely populated areas, especially with the bad sanitation system. The distribution of nitrate contaminated groundwater was correlated to the types of land use. The monitoring of land use change is needed especially from the agricultural areas to residential areas due to excessive population growth.