Water is one of the primary needs of all living things. In order to figure out the potential of water resources, we need to conduct a study about water supply. This study of water resources was conducted in Sumbermanjing Wetan district located in the southern part of Malang Regency. This study is limited to the initial review of the existence of potency water resources in the study area, without including a quantitative aspect of the water resources. The first identification was collecting the data of water resources found in Sumbermanjing Wetan, and then analyze them descriptively. This step was to figure out the potential and challenges of water resources in Sumbermanjing Wetan. The result of this study showed that there were water resources in the form of spring, surface water, and subterranean river. The big volume of spring had been used by the people to fulfill their daily needs. However, the changing of the karst landscape had produced pollution around the settlement. Besides, there was volume decreasing of the spring, and so was the water supply for the people. The people could make use of other water resources such as the subterranean river that flow a whole year to overcome the problem. The most potential subterranean rivers are in Mbah Wajib Cave, Limbah Cave, Krompyang Cave, Kedung Pitu Cave, and Emas Cave.
Karst of Sangkulirang Mangkalihat is one of the greatest karst areas in Indonesia and has hundreds of caves. Some of those caves are located at Suaran Block, one of the main karst block at this karst. This paper aims to study the speleogenesis process, as the fundamental process on karst landscape and cave development in that area. Speleogenetic process can be examined from the shape of the cave passage using uniformitarianism approach. That principle creates speleomorphology as the study of cave passage form and the factors that affect it. The examination of the cave passages uses cave maps to see the form and direction of them. As the result, caves at Suaran Block are formed mainly driven by geological structures such as fault – fissures and bedding plane which is indicated by linear form of the cave passage and water flow which shows sinusoidal form of the cave passage. Some caves are shaped by the combination of geological structure and water flows make them have mixed-induced speleogenesis.
Gua dapat membentuk lorong-lorong yang rumit. Lorong yang terbentuk tersebut hasil proses yang panjang dalam skala geologi. Kenampakan yang ada saat ini berasal dari kondisi regional yang membentuknya. Tiap kondisi bentangalam memiliki bentukan lorong gua yang berbeda-beda. Identifikasi secara terperinci dilakukan dengan melihat kondisi lorong gua secara detail serta melihat secara keseluruhan. Kajian ini bertujuan untuk mengetahui pola lorong yang berkembang pada gua-gua di Kabupaten Malang. Metode pengumpulan data menggunakan data primer berupa unit-unit gua. Gua yang didata sebanyak 48 peta gua yang selanjutnya akan dilakukan analisis dengan pembagian, diantaranya curvilinear passage sebanyak 22 sampel, linear passage sebanyak 12 sampel, ceruk sebanyak 5 sampel, dan sumuran sebanyak 9 sampel. Analisis dilakukan dengan pendekatan kuantitatif dengan menggunakan softwere ArcGis, Spss, dan XLSTAT. Dari hasil perhitungan dan identifikasi tersebut, memberikan gambaran mengenai pola yang berkembang di karst Kabupaten Malang yang memiliki 3 kondisi yaitu curvilinear, linier passage dan sumuran. Adanya tiga kondisi tersebut akan memiliki karakteristik yang berbeda, curvilinear akan membentuk zona vadose, epifreatik, dan freatik. Linier passage memiliki kondisi vadose dan epifreatik, sedangkan sumuran membentuk kondisi vadose.
Malang Regency has variety of landscapes. In the southern part of Malang Regency, there is a karst landscape showed by the existence of caves scattered in Wonosari Formation. The existence of those caves holds an important potential as the environmental services, one of those is as a specified tourism destination. The aim of this study is to know the condition and to analyze the potential of the caves a specified tourism destination in Malang Regency. The data in this study was collected by observing the condition of the cave through the cave passage and by doing in-depth interview with the manager of tourism objects in Malang regency. Field documenting and literature studies were also being conducted in order to support the analysis of this study. Data analyzing was conducted by using interactive data analysis consisted of data reduction, data presentation, ended by conclusion drawing. The result of the study showed that 134 caves had been recorded and 49 caves been mapped. Caves in Malang Regency potentially support the specified tourism destination. This was showed by the passages varied into horizontal cave passage and vertical cave passage. Some of the caves also have long passage. Besides the variety of caves passages, the caves in Malang Regency also have variety of ornament and the condition brings the value of education to the tourists. Some of the caves have subterranean river which can be used by the people. Thus, it becomes tourists’ attraction. The caves in Malang Regency are located close to coastal areas that become beach and marine tourism, so it will really support the development of caves as a specified tourism destination in the future. In order to acknowledge and enrich the society with skills dealing with the existence of caves as a specified tourism destination, the improvement of human resources should be carried out.
Gua merupakan ruang alamiah yang dapat dimasuki oleh manusia. Gua memiliki kenampakan berupa lorong vertikal, horizontal, maupun kedua lorong tersebut. Kajian ini bertujuan untuk mengetahui pola yang terbentuk dari lorong vertikal dan ruangan dari gua-gua karst di Kabupaten Malang. Metode yang digunakan yaitu survei lapangan dan analisis data sekunder. Pengukuran dan dokumentasi digunakan untuk mengetahui gambaran dari gua tersebut dilihat dari peta. Hasil kajian menunjukkan kedalaman lorong vertikal di Kabupaten Malang bervariasi berkisar antara 4,33 - 33,77 m, berupa singlepits maupun multipits. Selain itu, lorong vertikal di Kabupaten Malang memiliki beberapa tipe yaitu, shaft dengan single atau multipits, chimney, dan canyon. Kondisi lorong vertikal di Kabupaten Malang diakibatkan oleh proses pengangkatan yang terjadi pada masa lampau dan diikuti dengan perubahan muka air tanah yang ada di daerah tersebut. Pada bentukan chamber di masing-masing gua, menunjukkan ceruk memiliki persentase chamber yang tinggi, mengingat lorong yang terbentuk memiliki panjang lorong yang pendek. Sistem lorong gua yang membentuk volume chamber yang besar terlihat adanya runtuhan dan pertemuan sungai bawah tanah. Pada kondisi lorong vertikal memiliki nilai volume chamber yang kecil. Proses terbentuknya chamber pada wilayah kajian berada pada kondisi vadose dan epifreatik, kondisi ini terjadi dari beberapa proses yang terjadi di dalam gua, baik proses struktural, hidrologis, maupun runtuhan yang hingga saat ini masih terjadi. Terjadinya runtuhan gua mengakibatkan adanya subsidence yang menyebabkan tereksposnya lorong gua ke permukaan.
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