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"ABSTRAKSumber daya air adalah sumber daya alam yang jumlahnya tetap namunkeberadaannya dipermukaan dan didalam bumi sangat tergantung dari aktivitasmanusia. Pertumbuhan tutupan lahan yang tinggi dan pola konsumtif warga Jakartatelah menyebabkan degradasi air tanah di Jakarta. Program konservasi sumber dayaair sebagai program pembangunan berkelanjutan menjadi suatu keharusan yangdilaksanakan Pemerintah Daerah DKI Jakarta. Salah satu program konservasisumber daya air adalah pembangunan sumur resapan. Sumur resapan yang telahdibangun, hingga saat ini belum dilakukan evaluasi tingkat efektifitasnya baik darisegi kapasitas daya tampung air, kualitas air resapan dan sistem pengelolaannya.Tujuan dari penelitian ini adalah untuk mengevaluasi program pembangunan sumurresapan berdasarkan standar teknis SNI 03-2453-2002, SNI 06-2459-2002,Peraturan Gubernur nomor 20 tahun 2013 dan konsep sumur resapan ramahlingkungan. Penelitian ini dilakukan di wilayah Jakarta Timur dan Jakarta Selatan,kedua lokasi tersebut merupakan wilayah dengan nilai infiltrasi terbaik dibandingwilayah Jakarta lainnya. Metode penelitian menggunakan pendekatan kuantitatifdengan analisa kuantitatif dan kualitatif.Instrumen pengumpulan data berupa,pengamatan visual lapangan dan pengukuran dimensi inlet dan volume kosongsumur resapan, studi literature dan wawancara stake holder yang terkait sumurresapan.Hasil penelitian menunjukkan debit masukan sumur resapan kurang dari50% kapasitas tampung sumur, kapasitas tampung rata-rata sumur kurang dari 50%kapasitas awal, parameter air resapan yang melebihi baku mutu air golongan Iadalah kekeruhan,besi dan detergen. Lemahnya koordinasi antar Satuan PerangkatKerja Daerah dan tidak adanya perawatan sumur resapan menjadi penyebab tidakefektifnya program sumur resapan. Tipe sumur resapan dangkal yang dibangundigedung merupakan tipe sumur resapan yang paling efektif dibanding tipe lainnya

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ABSTRACTWater resources are natural resources whose number remains but its existence inthe earth's surface and is highly dependent on human activity. Land cover highgrowth and consumption patterns Jakarta residents has caused degradation ofground water in Jakarta. Water resource conservation programs as sustainabledevelopment becomes a necessity conducted local government of Jakarta. Oneprogram is the conservation of water resources development recharge wells.Recharge wells that have been constructed, up to now not been evaluated for theireffectiveness in terms of both capacity water capacity, catchment water quality andmanagement systems. The purpose of this study was to evaluate the recharge wellsdevelopment program based on technical standards SNI 03-2453-2002, SNI 06-2459-2002, Governor Regulation No. 20 of 2013 and the concept ofenvironmentally friendly recharge wells. This research was conducted in EastJakarta and South Jakarta, both locations is the region with the best infiltration valueother than Jakarta. The research method uses a quantitative approach with aqualitative and quantitative analysis. In the form of data collection instruments,visual observations and measurements of the dimensions of the field and the inletvoid volume recharge wells, literature studies and interviews relevant stakeholdersrecharge wells. The results showed a debit entries recharge wells is less than 50%capacities of wells, average capacities of the well is less than 50% of the initialcapacity, water absorption parameters that exceed water quality class I is turbidity,iron and detergents. Weak coordination between the Regional Unit of Work Toolsand absence of well maintenance leach into the causes of ineffective programsrecharge wells. Type of shallow recharge wells constructed infiltration wells in thehalls of a type most effectively than other types.;"

"Penelitian dilakukan di Daerah Aliran Sungai Opak Wilayah Prambanan dan sekitarnya meliputi Kecamatan Prambanan dan Piyungan, Yogyakarta dengan luas area sebesar 74,84 km. Selama beberapa tahun terakhir, daerah penelitian kerap dilanda  krisis air bersih bahkan di musim penghujan.  Kejadian ini sejalan dengan semakin bertambahnya pembangunan permukiman, tempat wisata, dan penginapan di daerah tersebut. Maka, peneliti melakukan pemetaan daerah potensi resapan sebagai salah satu upaya konservasi daerah resapan air dalam perencanaan tata ruang. Salah satu metode yang dapat digunakan untuk membuat peta potensi ialah metode penginderaan jauh dan SIG. Pada beberapa penelitian sebelumnya, metode ini dinilai cukup efektif dalam memetakan daerah resapan. Adapun berdasarkan penelitian sebelumnya, terdapat beberapa parameter yang digunakan penelitian ini untuk memetakan daerah resapan, yaitu kemiringan lereng, jenis tanah, litologi, tutupan lahan, densitas drainase, densitas kelurusan, dan curah hujan. Parameter-parameter ini kemudian diolah menjadi peta-peta tematik lalu direklasifikasi sesuai dengan tingkat kemampuan setiap kelasnya dalam menyerap dan meloloskan air ke akuifer. Setelah itu, dilakukan pembobotan menggunakan metode Analytical Hierarchy Process (AHP) dengan hasil yaitu: kemiringan lereng 32,3%, jenis tanah 23,4%, litologi 17,6%, tutupan lahan 10,4%, densitas drainase 7,6%, densitas kelurusan 4,7%, dan curah hujan 3,7%. Hasil integrasi ketujuhparameter menghasilkan lima kelas daerah potensi resapan yaitu potensi sangat rendah mencakup 0,6% daerah penelitian, potensi rendah mencakup 7,2%, potensi moderat mencakup 29,3%, potensi tinggi mencakup 42,5%, dan potensi sangat tinggi mencakup 20,7% daerah penelitian. 

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The research was conducted in the Opak River Watershed in the Prambanan and surrounding areas, covering Prambanan and Piyungan sub-districts, Yogyakarta with an area of 74.84 km. Over the past few years, the study area has often been hit by a clean water crisis even in the rainy season. This incident is in line with the increasing development of settlements, tourist attractions, and inns in the area. So, the researcher conducted a mapping of potential infiltration areas as one of the efforts to conserve water catchment areas in spatial planning. One method that can be used to create a potential map is remote sensing and GIS. In some previous studies, this method was considered quite effective in mapping infiltration areas. As based on previous research, there are several parameters used by this research to map infiltration areas, namely slope, soil type, lithology, land cover, drainage density, straightness density, and rainfall. These parameters were then processed into thematic maps and reclassified according to the level of ability of each class to absorb and pass water to the aquifer. After that, weighting was done using the Analytical Hierarchy Process (AHP) method with the results: slope 32.3%, soil type 23.4%, lithology 17.6%, land cover 10.4%, drainage density 7.6%, alignment density 4.7%, and rainfall 3.7%. The integration of the seven parameters resulted in five classes of infiltration potential areas: very low potential covering 0.6% of the study area, low potential covering 7.2%, moderate potential covering 29.3%, high potential covering 42.5%, and very high potential covering 20.7% of the study area."

"SUSTAIN merupakan suatu kerangka kerja dalam bentuk software yang dapat menjadi suatu pendukung keputusan terintegrasi untuk memilih penanganan dan lokasi wilayah resapan. Penggunaan Tanah dalam SUSTAIN sangatlah penting karena berguna untuk memprediksi arah aliran dan kualitas air pada bagian hulu sampai hilir Daerah Tangkapan Air DTA. SUSTAIN diterapkan pada DTA UI karena kondisi perairan yang tergolong buruk dan buruk sekali menurut BP3UI. Berdasarkan variabel yang ditetapkan oleh SUSTAIN dan penelitian terdahulu, variabel yang terpilih adalah Ketinggian, Lereng, Penggunaan tanah, Jenis Tanah, dan Jaringan Aliran Air. Penelitian bertujuan untuk menganalisis pengaruh perbedaan skala peta penggunaan tanah terhadap sebaran Teknologi LID pada wilayah resapan. Penentuan Teknologi LID pada wilayah resapan didasari oleh ketentuan US EPA yang terdapat pada modul BMP Siting tools didalam kerangka kerja SUSTAIN dan diolah dengan metode Intersect dengan parameter yang telah ditetapkan. Hasil penelitian menunjukkan semakin besar skala peta penggunaan tanah terhadap penerapan Teknologi LID lebih baik diterapkan pada lahan terbangun yang padat.

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SUSTAIN is a software based framework in form of integrated decision support to choose treatment and location of the Recharge Region. Landuse in SUSTAIN is important because it was useful for predicting the direction of water flow and quality upstream to downstream of the Catchment Area. SUSTAIN was applied to catchment area of Universitas Indonesia due to poor and bad waters condition category according to BP3UI. Based on the variables set by SUSTAIN and previous research, the selected variables are Altitude, Slope, Landuse, Soil Type, and Water Flow Network.

The objectives of the study were to analyze the influence of different scale of landuse map on the distribution of LID Technology in the catchment area. The determination of LID technology in the catchment area was based on the US EPA parameters contained in the BMP Siting tools module within the SUSTAIN framework and processed by the Intersect method with predefined parameters. The results show that the larger scale of land use maps on the application of LID Technology is better applied to dense constructed land."

"Pengelolaan Sumber Daya Air perlu mengidentifikasi kawasan lindung dan budidaya atau discharge-recharge area. Setiap kawasan ini memilki kelebihan dan kekurangan tersendiri relatif terhadap kepentingan yang ada. Tidak jarang terjadi konflik kepentingan dalam penetapan kawasan ini sehingga penetapan batas antara discharge-recharge area menjadi sangat krusial. Penetapan discharge-recharge area dapat dilakukan dengan menggunakan simulasi groundwater flow dengan memperhatikan sisi karakteristik air tanah. Pada penelitian ini, penulis berusaha melakukan identifikasi discharge-recharge area dengan program model dua dimensi elemen hingga saturated-unsaturated. Diketahui bahwa program model dua dimensi saturated adalah model yang lebih sederhana sehingga program model ini lebih murah. Akan tetapi, dalam penggunaannya program model ini terbukti tidak dapat dipakai untuk penetapan discharge-recharge area karena tidak mampu mengakomdasi terjadinya simulasi aliran air tanah yang mampu menembus muka air tanah. Hal ini merupakan konsep dasar yang harus terpenuhi. Program model yang mampu mengakomodasi hal ini adalah program model dua dimensi saturated-unsaturated.

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Water Resources Management need to identify groundwater conservation and cultivation area or discharge-recharge area. Each area has its own advantages and disadvantages relative to interest. There are often happen a confilct of interest caused by determination of this area, so that the determining boundary discharge-recharge area become crucial. Determination of discharge-recharge area can be done using groundwater flow simulation by considering the groundwater characteristics. In this study, the author attemped to identify discharge-recharge area using two dimensional saturated-unsaturated finite element program model. It is known that two dimensional saturated program model is simpler program model so that the it is less expensive model. However, this program model is proven can not be used to determine discharge-recharge area because it is can not accomodate the simulation that groundwater flow is able to penetrate."

"Kabupaten Sumbawa Barat menjadi kawasan andalan bagi Provinsi NTB dengan pertumbuhan penduduk dan pertumbuhan industri yang terus meningkat. Proyeksi kebutuhan air dari sektor industri pada tahun 2037 menyentuh angka 13,56 juta liter per hari. Sesuai regulasi, pemenuhan kebutuhan air bersih bagi sektor industri harus menggunakan akuifer dengan kedalaman lebih dari 40 meter. Untuk mengidentifikasi lapisan batuan terkait potensi air tanah digunakan metode geolistrik 2D. Lima lintasan geolistrik diukur menggunakan resistivitas meter dengan konfigurasi Wenner-Schlumberger, jarak elektroda 15 meter dan panjang masing-masing jalur 705 meter. Lapisan akuifer dengan kedalaman lebih dari 40 meter diduga berupa pasir lempungan dan breksi lapuk yang tersaturasi dengan kisaran resistivitas 0-30 Ωm dengan batas nir akuifer berupa breksi segar. Akuifer ditemukan pada semua lintasan dengan lintasan 3 menjadi daerah paling prospektif. Titik rekomendasi pengeboran berada tepat di lintasan 3 bagian Barat Daya.

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West Sumbawa Regency is a mainstay area for NTB Province with population growth and industrial growth that continues to increase. The projected water demand from the industrial sector in 2037 will reach 13.56 million liters per day. According to regulations, the fulfillment of clean water needs for the industrial sector must use aquifers with a depth of more than 40 meters. To identify rock layers related to groundwater potential, the 2D geoelectric method is used. Five geoelectric lines were measured using a resistivity meter with a Wenner-Schlumberger configuration, the electrode distance was 15 meters and the length of each line was 705 meters.. The aquifer layer with a depth of more than 40 meters is assumed to be clay sand and weathered breccia which are saturated with a resistivity range of 0-30 m with the non-aquifer boundary in the form of fresh breccia. Aquifers were found in all paths with path 3 being the most prospective area. The drilling recommendation point is right on track 3 of the Southwest section."

"During the last decade, water scarcity in terms of quantity and quality degradation has become a major issue in Indonesia. In 2006, Universitas Indonesia (UI) supported by the Ministry of Public Works built a recharge pond as a field model to overcome flood and drought in Jakarta and its surroundings. However, since then, a lack of research has been conducted to monitor and analyze the rate of change in water quality in the UI recharge pond. The purposes of this study are to identify the characteristics of UI recharge pond and evaluate the surface water quality changes. Water samples were taken from the pond and analyzed in the laboratory for water quality tests. The evaluation method used for simulation of water quality was a numerical model using Runge-Katta Order 4. Laboratory analysis results show concentrations of Mn, Fe, BOD and COD are exceeding the water quality standards (GR No.82/2001). The water purification process in the pond was found to be faster in response to BOD (?= 0.5 d-1) and for Mn, Fe, and COD are found to have similar results at ?= 0.4 d-1. The 95% response time of the pond was found to be longer for Mn, Fe, and COD (t95 = 7.5 d) and the faster rate is BOD (t95 = 6.0 d). The result of numerical modeling demonstrates Mn concentration in the pond will be doubled (0.45 mg/L) on the day-15th and asymptotically converges on a steady state. The Fe, BOD, and COD reaches the steady state concentration around on the day-11th (0.95 mg/L), on the day-13th (56.6 mg/L), and on the day-17th (224 mg/L), respectively."