Analyzing the Characteristics of Domestic Wastes in Belik River, the Special Region of Yogyakarta, Indonesia

Abstract

<jats:p>The multiplying number of population in the City of Yogyakarta has resulted in a larger volume of wastes in the region. People living on the riverbanks are unfortunately in the habit of discarding domestic waste directly to the river channel, worsening the already polluted water. This study was intended to analyze the characteristics of the municipal wastewater contaminating Belik River. During the water quality test, a rapid investigation method and laboratory analysis were employed. The sampling in the field was based on river segments and travel time of river water. Based on the laboratory test results, the concentrations of phosphate, BOD, and COD in the water bodies had exceeded the standard for Class II water quality indicating pollution due to frequent disposal of household wastes like detergents. The higher the BOD and COD levels, the more unsuitable the water for fisheries and agricultural practices.</jats:p>

HEC-HMS Model for Urban Flood Analysis in Belik River, Yogyakarta, Indonesia

“…The results of simulations with the HEC-HMS model can subsequently be incorporated into the management of the Belik Watershed. Land use conditions in the Belik watershed in 2013 were dominated by settlements, covering an area of 204.42 ha (Suprayogi et al 2019). Construction continues to this day, both repairing roads and other infrastructure, as well as construction of new buildings.…”

“…Flooding in urban areas is also caused by the lack of retention and drainage capacity available in the city (Jamali et al 2018). Some of the areas that were inundated by the overflow of Belik River were around Colombo Street and Kampung Klitren (Suprayogi et al 2019). Based on local news, events that were quite detrimental were in 2012, 2018, and early 2020.…”

Indeks Pemakaian Airtanah Di Kota Yogyakarta

“…Hal ini menyebabkan jumlah penduduk yang tinggi dan kebutuhan airtanah menjadi sangat tinggi. Penurunan indeks pemakaian airtanah dapat dikurangi dengan memberikan alternatif sumber air bersih misalnya dari pengolahan air sungai, meskipun saat ini banyak sungai di Yogyakarta telah mengalami pencemaran yang cukup parah (Suprayogi et al, 2019). Oleh karenanya diperlukan infrastruktur pengolahan air bersih seperti yang telah ada di banyak kota besar di dunia ataupun di Indonesia.…”

Flow Engineering to Remediate Contaminated Water Quality Due to Domestic Waste Disposal in Belik River, Yogyakarta

“…Deoxygenation occurs when bacteria use dissolved oxygen to decompose organic matters, while reaeration introduces oxygenated air into waters by turbulence (Vandra et al, 2016;Yustiani et al, 2018). As part of the environment, many rivers are in poor conditions and prone to ecological changes indicated by degrading water quantity and quality (Suprayogi, Marfai, et al, 2019).…”

“…One of them is the change in land use dominated by housing and office buildings. It has increased by 1.44 Ha in the previous period, and the reduction in the vegetated area has reached 23.47 Ha (Suprayogi, Marfai, et al, 2019). It includes the construction and procurement of infrastructure to evenly distribute urban facilities that continue to expand with the city's development.…”