Hasil Pencarian  ::  Simpan CSV :: Kembali

"Sungai Ciliwung merupakan salah satu sungai di Pulau Jawa yang tercemar oleh limbah dari aktivitas rumah tangga, komersial/industri serta pertanian. Pesatnya pertumbuhan penduduk akan memicu adanya perubahan tata guna lahan. Seiring dengan pertumbuhan penduduk dan perkembangan aktivitas manusia di berbagai sektor, pencemaran air sungai menjadi masalah serius yang dihadapi oleh manusia. Tujuan dari penelitian ini adalah untuk melakukan analisis spasiotemporal terhadap konsentrasi dan beban pencemar air Sungai Ciliwung serta korelasinya dengan tren perubahan tata guna lahan untuk mengetahui faktor-faktor dominan yang memengaruhi beban pencemaran sungai tersebut. Analisis dilakukan terhadap parameter pencemar organik dan nutrien (BOD, COD, DO, TSS, NH3, NO2, NO3 dan Total Fosfat) dengan menggunakan data debit dan kualitas air Sungai Ciliwung dari BBWS Ciliwung – Cisadane. Secara spasial, konsentrasi dan beban pencemar organik dan nutrien dari hulu ke hilir cenderung menunjukkan peningkatan dari hulu hingga ke hilir. Sedangkan secara temporal, konsentrasi pencemar organik (BOD dan COD) memuncak di tahun 2018 kemudian mengalami penurunan hingga tahun 2020. Kemudian, konsentrasi pencemar nutrien (NH3, NO3, T-P) dan TSS paling tinggi adalah pada tahun 2020. Tren beban BOD, NH3, NO2dari tahun 2016 – 2020 meningkat, sedangkan tren beban COD, TSS, NO3, dan Total Fosfat dari tahun 2016 – 2020 menurun. Bila dilihat dari tren perubahan tutupan lahan dan nilai koefisien korelasi, peningkatan persentase lahan permukiman menyebabkan meningkatnya beban pencemar. Hal tersebut ditunjukkan dari hasil uji korelasi yang positif kuat-moderat antara keduanya. Sedangkan hasil uji korelasi persentase lahan pertanian dengan beban pencemar menunjukkan korelasi negatif moderat dengan lahan pertanian. Dari hasil uji tersebut dapat diperkirakan bahwa limbah aktivitas pertanian secara kuantitas tidak lagi signifikan terhadap pencemaran di badan air bila dibandingkan dengan kegiatan domestik. Selain itu, rata-rata rasio BOD/COD didapatkan kurang dari 0,3 (bersifat non-biodgradable) sebagai indikator adanya pencemaran dari kegiatan non-domestik seperti kegiatan komersil/industri dan TPA. Hasil penelitian menunjukkan bahwa aktivitas antropogenik yang paling dominan memengaruhi beban pencemar organik dan nutrien di DAS Ciliwung dalam penelitian ini adalah kegiatan domestik (secara khusus akibat limbah greywater), serta limbah kegiatan komersil/industri yang tidak memenuhi standar yang ditetapkan namun langsung dibuang ke saluran air dan mengalir ke badan air.

---

Ciliwung River is one of many rivers on the Java Island which is polluted by waste from domestic, commercial/industrial and agricultural activities. The rapid population growth caused changes in land use. Along with population growth and the development of human activities in various sectors, river pollution became a serious problem for humans. The purpose of this study is to conduct a spatiotemporal analysis of the concentration and pollutant load of the Ciliwung River and its correlation with the trend of land use changes to determine the factors that dominantly influence the river pollution. The analysis was carried out on the parameters of organic pollutants and nutrients (BOD, COD, DO, TSS, NH3, NO2, NO3 and Total Phosphate) using the flow and water quality data of the Ciliwung River from BBWS Ciliwung – Cisadane. Spatially, the concentration of organic pollutants and nutrients increased from upstream to downstream. Spatial variations in organic and nutrient pollutant loads also tend to show an increase from upstream to downstream. Meanwhile, temporally, the concentration and load of organic pollutants (BOD and COD) peaked in 2018 and then decreased until 2020. Then, the concentration and load of nutrient pollutants (NH3, NO3, T-P) and the highest TSS was in 2020. The trend of BOD, NH3, and NO2 loads from 2016 – 2020 increased, while the trend of COD, TSS, NO3, and Total Phosphate loads from 2016 – 2020 decreased. From the trend of land cover changes and the value of coefficient correlation, an increasing percentage of residential land caused an increasing pollutant load. This is indicated by the results of a strong-moderate positive correlation test between those two. While the results of the correlation test of the percentage of agricultural land with the pollutant load showed a negative correlation. From that results, it can be estimated that the waste of agricultural activity is no longer significant in terms of pollution in water bodies compared to domestic activities. In addition, the average BOD/COD ratio was found to be less than 0,3 (non-biodgradable) as an indicator of pollution from non-domestic activities such as commercial/industrial activities or landfill runoff. The results showed that the most dominant anthropogenic activities affecting organic and nutrient pollutant loads in the Ciliwung watershed in this study were domestic activities (particularly due to greywater waste), as well as the waste of commercial/industrial activities that did not meet the established standards but were directly discharged and flowed into a water body."

"Penggunaan minyak sawit sebagai bahan baku bahan bakar memiliki isu keberlanjutan. Studi keberlanjutan sebelumnya telah membahas isu lingkungan dari bahan bakar nabati berbasis kelapa sawit, tetapi belum memperhatikan aspek manusia. Secara konseptual, pendekatan keberlanjutan adalah keseimbangan antara aspek sosial, ekonomi, dan lingkungan. Penelitian ini bertujuan untuk menganalisis indikator keberlanjutan rantai pasok produksi bahan bakar nabati berbasis kelapa sawit campuran Fatty Acid Methyl Ester (FAME), Hydrotreated Vegetable Oil (HVO), dan Minyak Solar menggunakan Life Cycle Sustainability Assessment (LCSA). Emisi gas rumah kaca, ekosistem, dan kesehatan manusia diperhitungkan sebagai aspek lingkungan, kemudian biaya produksi, penghematan devisa, dan kerugian pungutan ekspor sebagai aspek ekonomi, dan penciptaan lapangan kerja dan pendapatan sebagai aspek sosial. Pembobotan ketiga aspek keberlanjutan diterapkan secara setara, kemudian dinilai berdasarkan peringkat indikator keberlanjutan. Campuran FAME, HVO, dan minyak solar diskenariokan berdasarkan standar kualitas EURO1, EURO2/3, EURO4, dan EURO5. Hasil LCSA menunjukkan EURO5 memiliki kinerja keberlanjutan tertinggi dengan skor 3,22, sedangkan EURO1 memiliki kinerja keberlanjutan terendah dengan skor 2,00. Penggunaan minyak kelapa sawit (CPO) memberikan kontribusi terhadap kinerja lingkungan dan ekonomi. Land-use change dan harga dari CPO adalah parameter yang paling signifikan mengurangi kinerja lingkungan dan ekonomi, di sisi lain juga menciptakan lapangan pekerjaan dan meningkatkan pendapatan seiring semakin tingginya campuran bahan bakar nabati. Dari hasil LCSA disarankan untuk memenuhi spesifikasi kualitas bahan bakar serta pemilihan bahan baku yang berkelanjutan.

---

The use of palm oil as a raw material for fuel has sustainability issues. Previous sustainability studies have addressed the environmental issues of palm oil-based biofuels, but have not considered the human aspect. Conceptually, the sustainability approach is a balance between social, economic, and environmental aspects. This study aims to analyze supply chain sustainability indicators for the production of palm oil-based biofuels with a mixture of Fatty Acid Methyl Ester (FAME), Hydrotreated Vegetable Oil (HVO), and Diesel Oil using the Life Cycle Sustainability Assessment (LCSA). Greenhouse gas emissions, ecosystems, and human health are taken into account as environmental aspects, then production costs, foreign exchange savings, and export levy losses as economic aspects, and job creation and income as social aspects. The weighting of the three sustainability aspects is applied equally, then assessed based on the ranking of sustainability indicators. The mixture of FAME, HVO, and diesel oil is screened based on the EURO1, EURO2/3, EURO4, and EURO5 quality standards. The LCSA results show that EURO5 has the highest sustainability performance with a score of 3.22, while EURO1 has the lowest sustainability performance with a score of 2.00. The use of palm oil (CPO) contributes to environmental and economic performance. Land-use change and the price of CPO are the parameters that most significantly reduce environmental and economic performance, while also creating jobs and increasing income as the biofuel mix increases. From the results of the LCSA, it is recommended to meet the fuel quality specifications as well as the selection of sustainable raw materials."

"Perubahan penutup lahan yang signifikan dapat mengancam keberadaan lokasi wisata Green Canyon. Peran stakeholder sangat menentukan bagi perkembangan lokasi wisata. Tujuan riset ini adalah untuk menganalisis perubahan penutup lahan, kerentanan wilayah, dan melihat peran stakeholder dan model kerjasama diperbatasan kedua kabupaten, sehingga tercipta model pertumbuhan ekowisata berkelanjutan. Riset ini menggunakan geographyc information system (GIS) dan penginderaan jauh yaitu multi actor multi criteria analysis (MAMCA) dan CA-Markov. Hasil riset menunjukkan bahwa pada tahun 2000 sampai tahun 2020 terjadi peralihan penutup lahan sebesar 54%. Lokasi wisata Green Canyon terdapat pada lokasi dengan indeks kerentanan bahaya tinggi. Pemain utama/Key Players (KP) adalah kelompok stakeholder yang memiliki peran sangat penting bagi pengembangan lokasi wisata Green Canyon. Berdasarkan persepsi masyarakat, maka di Desa Medalsari dan Desa Cikutamahi kerjasama yang diprioritaskan yaitu pariwisata, lapangan pekerjaan, dan pendidikan. Kesimpulan riset ini adalah menurut stakeholder KP pada tahun 2030 model pertumbuhan lokasi wisata diprediksi akan berkembang menjadi kebun campuran dan lahan terbangun.

---

A significant land use/land cover change could jeopardize the existence of Green Canyon. Stakeholders' role play important role in preserving Green Canyon.This research aims to analyze LULCC, spatial vulnerability, stakeholder role, and cooperation model within the border of two regencies, so that sustainable ecotourism growth. The method used in this research is geographic information system (GIS), remote sensing, multi-actor multi criteria analysis (MAMCA), and CA-Markov. Results show that from 2000-2020 there is a 54% conversion between one LULC class to another. This study finds that GCW is located within a high vulnerability zone. Key Players (KP) is a stakeholder group with a crucial role in GCW development. Based on community perception in Cikutamahi and Medalsari Villages, future cooperation should be focusing on tourism, culture, employment, and education. It can be concluded that according to the KP stakeholder group, in 2030 it is predicted that the tourism growth model in the west border will become mix plantation and built-up.

"

"Dalam hukum World Trade Organization (WTO), persoalan lingkungan hidup diatur pada Pasal XX (b) dan (g) GATT 1994, beserta dua peraturan khususnya yakni, The Agreement on the Application of Sanitary and Phytosanitary Measures (SPS Agreement) dan Agreement on Technical Barriers to Trade (TBT Agreement). Sehubungan dengan ini, pada tahun 2018 Uni Eropa mengeluarkan Renewable Energy Directive (RED) II terkait kebijakan pelarangan penggunaan minyak kelapa sawit untuk kebutuhan biofuels pada 2030, yang dilakukan secara bertahap dari tahun 2021. Dasar pelarangan ini adalah untuk melindungi lahan dengan stok karbon tinggi yang diakibatkan oleh pembukaan lahan untuk perkebunan sawit. Oleh karena itu, skripsi ini melakukan analisis kesesuaian kebijakan larangan impor atas dasar lingkungan hidup ini terhadap pengaturan dalam WTO. Penelitian ini menggunakan metode yuridis normatif, dengan melakukan studi kepustakaan terhadap teks RED II dengan kebijakan tata kelola sawit Indonesia berdasarkan peraturan perundang-undangan Indonesia dan sumber hukum WTO. Hasil dari penelitian ini menunjukan bahwa kebijakan pelarangan impor Uni Eropa tidak masuk dalam ruang lingkup ruang lingkup SPS Agreement ataupun TBT Agreement.  Kebijakan ini merupakan bentuk hambatan kuantitatif yang melanggar GATT 1994 karena tidak memenuhi persyaratan Pasal XX (g) GATT 1994. Kebijakan ekstrateritorial Uni Eropa ini juga tidak dapat dibenarkan karena tidak memenuhi ketentuan chapeau.

---

Under World Trade Organization (WTO) law, Article XX (b) and (g) GATT 1994, and its two specialized agreements, The Agreement on the Application of Sanitary and Phytosanitary Measures (SPS Agreement) dan Agreement on Technical Barriers to Trade (TBT Agreement) provide environmental-trade measure rulings. In this regard, European Union seek to gradually limit palm oil from 2021 and phase out the use for biofuels by 2030 within Renewable Energy Directive (RED) II that was released in 2018. This measure is set to limit biofuels produced from significant expansion of the production area into land with high carbon stock is observed. This research uses normative juridical approach by literature study of RED II legal text and Indonesian palm oil governance within relevant laws and WTO sources of law. The result indicates that the EU measure is is not fell under scope of SPS Agreement as well as TBT Agreement. This environmental-trade measure is found to be inconsistent to GATT substantive rule of quantitative restriction as it fails to fulfill requirements under Article XX (g) GATT 1994. As it does not satisfy chapeau requirements, the European Union extraterritorial measure can not be justified."

"ABSTRAKKelapa sawit adalah komoditas yang saat ini berkembang paling pesat di wilayah Kabupaten Bangka Barat Provinsi Kepulauan Bangka Belitung. Banyaknya aktivitas budidaya komoditas ini dalam skala besar yang dilakukan oleh pihak swasta telah berdampak pada perubahan tutupan lahan serta berpengaruh pada kondisi sosial ekonomi masyarakat sekitar perkebunan. Tujuan umum dari penelitian ini adalah menyusun rencana upaya pemanfaatan lahan pertanian yang berkelanjutan di wilayah Bangka Barat untuk masa mendatang terkait dengan dampak negatif aktivitas kelapa sawit swasta pada kondisi lingkungan dan kondisi sosial ekonomi masyarakat.Metode penelitian secara umum menggunakan metode observasi lapangan, studi dokumen dan metode survei dengan teknik estimasi dan overlay. Penelitian menggunakan data sekunder berupa data dan peta penggunaan lahan historis selama periode 1990-2011, peta HGU sawit swasta dan peta-peta dasar RTRW. Data primer dalam penelitan didapatkan dari hasil wawancara dan digunakan untuk menggambarkan kondisi sosial ekonomi masyarakat sebagai dampak adanya aktivitas kelapa sawit swasta.Hasil penelitian menunjukan bahwa konversi tutupan lahan menjadi lahan kelapa sawit swasta selama periode 1990-2011 di Kabupaten Bangka Barat dominan terjadi pada kelas perkebunan atau kebun seluas 15.492,2 ha, disusul kelas pertanian lahan kering campur semak dan kebun campur 7.978,6 ha dan kelas semak belukar seluas 6.513,4 ha. Dari sisi sosial ekonomi, aktivitas kelapa sawit swasta diketahui telah berpengaruh pada skala kepemilikan lahan oleh masyarakat, perubahan perilaku pola hidup masyarakat petani karet, dan hilangnya sistem kebun desa. Rencana pemanfaatan lahan sebagai hasil dan tujuan akhir penelitian dibuat dengan mempertimbangkan dampak aktivitas kelapa sawit swasta pada perubahan tutupan lahan serta kondisi sosial ekonomi masyarakat, di antaranya adalah melakukan aspek pertimbangan komoditas alternatif, penentuan luas dan lokasi masing-masing kombinasi dari komoditas alternatif dan mengikutsertakan beberapa nilai-nilai luhur sosial yang harus tetap terpelihara dalam aktivitas pertanian dan perkebunan di masa mendatang.

---

ABSTRACTPalm oil is a commodity which currently grew with the most rapid rate at the region of West Bangka Regency, Bangka Belitung Islands Province. The many activities of cultivation of this commodity on a large scale by the private sector have an impact on land cover changes and on socio-economic conditions of communities around the plantation. The general objective of this research is to develop a plan of sustainable agricultural land use in West Bangka Regency for the foreseeable future related to the negative impact of private palm oil activities on environmental and socio-economic conditions of society.Research methods in general using field observation method, document study and survey methods by estimation and overlay techniques. The study uses secondary data which are historical land use maps for the period 1990-2011, private oil concession maps and basic map of Spatial Planning. Primary data in the study obtained from the interviews which are used to describe the socio-economic conditions of society as a result of the presence of private oil palm activity.The results showed that conversion of land cover into oil palm private land during 1990-2011 in the West Bangka Regency occured dominantly on plantation or garden class 15.492,2 ha, followed by dryland farming class mixed shrub and mixed plantations 7.978,6 ha and class shrub 6.513,4 ha. In terms of socio-economic, private palm oil activities is known to have an effect on the scale of land ownership by the community, changes in lifestyle behaviors on rubber farming community, and the loss of rural farm system. Land use plans as a result and ultimate goal of this research made by considering the impact of private palm oil activity on land cover change and socio-economic conditions of society, in between was doing consideration aspect of alternative commodities, determining the extent and location of each combination of alternative commodities and include several noble social values that should be maintained in agricultural and plantation activities in the future."

"The title of the thesis is "Land Use Change Analysis of Rice Field in Kabupaten Karawang in the Years of 1989 and 1997 Using Landsat TM Image". Rapid growth of population and various human activities are main causes of land use change of rice field in Kabupaten Karawang. Geographically, Kabupaten Karawang is located in West Java Province, mostly in flat area; having fertile soil comprises of volcanic alluvium, i.e., sand, ash and clay. The area is popular as one of the national rice producing areas. The observation of this thesis was conducted for analyzing land use changes of the years of 1989 and 1997. Within those time periods with the help of Landsat images the changes of land use on rice fields into developed areas are observe able, reducing the area of the total rice fields. The unit analysis is kecamatan. To estimate the changes, this thesis uses a land use changes models, i.e., L = f(Economy, Population, and Policy), where L indicates land use change from rice field into developed area. L is considered as a dependent variable, representing human dimension. The independent variables are economy, population, and policy. These variables were tested with multiple linier regression analysis. The economic variable comprises of PDRB (Regional Gross Domestics Product) of industry, PDRB of cash crops, and PBB (Property Tax). Population variable consists of total population of the of 0 to 74 years old, total farm labors of 10 to 64 years old, and total non farm labor of 10 to 64 years old. Policy variable involves the region of developed area, the number of SD (elementary school), SMP (junior school), and Puskesmas. The analysis of Landsat 5 TM images shows that the highest changes are in Kecamatan Cilamaya and Telukjambe. The less changes are in Kecamatan Pangkalan and Lemahabang. Statistical analysis was applied to get better understanding of the changes of rice fields into developed areas. An equation was used to observe the growth of changes of rice fields into developed area, and the pattern of land change of rice fields into develop area in the year of 1997 to 1989. From the results of statistical analysis it can be concluded that the pattern of land use change of rice fields into developed area in the year of 1997 to 1989 has a significant correlation with the dependent variables. The equation can be used as a model to analyze the changes of the area of rice fields into developed area."

"DAS Ngrowo Ngasinan merupakan sebagian wilayah dari Kabupaten Trenggalek. Wilayah tengah DAS berupa dataran rendah dan cekungan, sehingga sering terjadi banjir. Penelitian ini mengkaji tentang wilayah sebaran genangan banjir beserta faktor penyebabnya dari tahun 1992-2008. Analisis yang dilakukan yaitu secara deksriptif tentang wilayah sebaran banjir yang terdapat di daerah yang memiliki bentang alam dataran dan landai terutama pada penggunaan tanah berupa sawah dan pemukiman. Hasil asosiasi semua faktor, didapatkan faktor curah hujan yang cukup berpengaruh terhadap kejadian banjir di Trenggalek. Selain itu, faktor topografi wilayah yang relatif datar dan landai serta adanya perubahan fungsi lahan dari kawasan hutan menjadi wilayah pemukiman, tegalan atau kebun campuran dan lahan terbuka juga ikut berpengaruh terhadap kejadian banjir di DAS Ngrowo Ngasinan.

---

Catchments area of Ngrowo Ngasinan is still part of Trenggalek Regency. The middle region of this catchments area is plain and dip, thus flood is often occurred. This research is to study about distribution region for ponds of flood as well as their cause factors from 1992 - 2008. The analysis which is used is descriptive to allocation of precipitation zone along catchments in order to locate in flatland area and plain, particularly mountain. From association of all factors are obtained that rainfall influences flood up on flood occurrence. Besides topography, which is relatively flat, plain, and the existence of function cause of forest zone to settlement and opened land also influences up on flood occurrence in Ngrowo Ngasinan catchments area."

"Banjir merupakan bencana alam yang makin marak terjadi belakangan ini dan mengakibatkan berbagai macam kerugian. Tidak hanya diakibatkan oleh fenomena alam, ternyata kini pertumbuhan dan perkembangan kota secara fisik juga memiliki keterhubungan yang sangat erat dengan proses terjadinya banjir. Bidang arsitektur dan terapannya menjadi salah satu bidang yang berperan aktif dalam proses tersebut. Ketika pertumbuhan dan perkembangan sebuah kota menjadi suatu hal yang tidak terelakan, bidang arsitektur dan terapannya harus dirancang dengan setepat mungkin, sesuai dengan karakteristik kawasan tersebut. Sehingga bidang arsitektur dan terapannya bukannya memperburuk kondisi banjir, malah dapat dimanfaatkan untuk meminimalisir dampak dari banjir.

---

Risks of flooding harm many aspects of human life. Floods are being included as catastrophe, disaster that happens because of nature. But, nowadays, floods happened not only because natural phenomenon but also because of cities development and cities growth. Architecture and its realm became one of many fields in science which is so related with flooding process. When the development and the growth of cities occurred continuously and inevitably, architecture and its realm should be designed as good as possible by concern about city characteristics where the design will be applied. So architecture and its realm rather than make flood hazard worsen, can be used even to minimize the impact of floods."

"ABSTRAKSungai-sungai di Papua pada umumnya dipengaruhi oleh kondisifisik,sehingga sering terlihat keruh secara alami, karena tersuspensi oleh lumpurtanah dan material lainnya, sehingga kualitas air secara fisik dari warna dantingkat kekeruhannya dapat dikatakan berkualitas buruk. Hal ini diperparah lagidengan adanya aktivitas manusia yang mengubah penutup tanah di daerah aliransungai (DAS). Penelitian ini dilakukan di DAS Sentani Papua, yang fokuspenelitiannya di Sub DAS Jembatan II, Flafouw dan Belo. Tujuan penelitianuntuk mengetahui pengaruh perubahan penggunaan tanah terhadap kualitas airpada tahun 2005-2013 serta megetahui prakiraan kualitas air pada priode waktu2025. Metode yang digunakan adalah analisis spasial dan temporal berbasissistem informasi geografi (SIG) dengan dasar citra Landsat 7 ETM sebagai basisperolehan data sekunder tentang penggunaan tanah. Survey untuk mengambilsampel air pada muara setiap Sub DAS yang dikaji, kemudian sampel airdianalisis dilaboratorium guna memperoleh informasi tentang kualitas air, yangbaku mutunya mengacu pada Peraturan Pemerintah Nomor 82 Tahun 2001,selanjutnya dilakukan penentuan status mutu air dengan metode STORET sesuaidengan Keputusan Menteri Negara Lingkungan Hidup Nomor 115 Tahun 2003.Analisis yang digunakan dalam penelitian ini adalah analisis spasial deskriptifkuantitatif dan analisis sistem dinamik. Hasil penelitian menunjukan parameterkualitas air yang melewati baku mutu di ketiga Sub DAS adalah Total SuspendedSoild (TSS) dan Posfat (PO₄), sedangkan Nitrat (NO₃) tidak melewati baku mutuyang ditetapkan berdasarkan kelas I. Status mutu air menunjukan Sub DASJembatan II, Flafouw, dan Belo telah tercemar dengan kondisi cemar rigan.Penggunaan tanah yang menyumbang beban pencemaran Total Suspended Soild(TSS) dan Posfat (PO₄) paling besar adalah permukiman, kebun/ perkebunan,tanah terbuka, dan semak belukar. Berdasarkan hasil simulasi model kualitas airmenunjukan adanya kecenderugan parameter Total Suspended Soild (TSS), Posfat(PO₄) di ketiga Sub DAS akan terus meningkat mulai dari awal simulasi sampaiakhir simulasi (2005-2025) yang nilainya melewati baku mutu. Sedangkan Nitrat(NO₃) akan terus meningkat tetapi tidakmelewati baku mutu.

---

ABSTRACTThe rivers in Papua in general is influenced by the physical condition, sooften seen naturally turbid because of suspended mud soil and other materials, sothat the physical water quality of the color and turbidity levels can be said to be ofpoor quality. This is reinforced by the presence of human activity that alters landcover in the watershed (DAS). This research was conducted in the watershedSentani Papua, the focus of his research in Sub-watershed JembatanII, Flafouwand Belo. The purpose of the study to determine the effect of land use change onwater quality in the years 2005-2013 and forecasts know water quality in theperiod of time in 2025. Methods used are based on the analysis of spatial andtemporal geographic information systems (GIS) on the basis of Landsat 7 ETMimagery as a base acquisition secondary data on land use. Survey to take watersamples at the mouth of each sub-watershed were assessed, then the watersamples were analyzed at the lab in order to obtain information about waterquality, the quality standard based on Government Regulation No. 82 of 2001,then performed the determination of water quality status with STORET method inaccordance with the Decree of the Minister state of the Environment No. 115 of2003. analysis used in this research is descriptive quantitative analysis of spatialand dynamical systems analysis. The results showed the water quality parametersthat pass the quality standard in three sub-watersheds are TSS and PO ₄, whereasNO ₃ does not pass quality standards established by class I. Status of water qualityshowed sub watershed Bridge II, Flafouw, and Belo have been contaminated withthe condition blackened Rigan . Land use accounts for TSS pollution load and PO₄ most of it is residential, farm / plantation, open land, and shrubs. Based on thesimulation results showed the presence of the water quality model parameterskecenderugan TSS, PO ₄ in the third sub-watershed will continue to increase fromthe beginning of the simulation until the end of the simulation (2005-2025) whosevalue is passed quality standards. While NO ₃ will continue to increase but did notpass pass qualitystandards."

"ABSTRAKCurve Number (CN) merupakan parameter empiris yang digunakan untuk memprediksi limpasan permukaan berdasarkan tata guna lahan pada suatu kelompok tanah hidrologi dalam kondisi kelengasan tanah tertentu pada suatu daerah aliran sungai (DAS), sehingga tingkat kedetailan suatu peta tata guna lahan akan mempengaruhi perhitungan nilai CN-terbobot. Sistem Informasi Geografis memungkinkan untuk menggabungkan dan menganalisis data-data spasial tersebut. Dalam perhitungan nilai CN pada DAS Ciliwung orde 2 yang terdiri dari 14 sub-DAS digunakan peta tata guna lahan skala 1:250.000, dan dalam perhitungan nilai CN pada DAS Ciliwung orde 3 yang terdiri dari 126 sub sub-DAS digunakan peta tata guna lahan skala 1:25.000. Perbandingan kedua nilai CN yang dibobotkan pada setiap sub-DAS menunjukkan tingkat perbedaan yang tidak signifikan yaitu dengan persentase perbedaan 0% sampai 6%.

---

ABSTRACTCurve Number (CN) is an empirical parameter used to predict runoff based on land use, hydrologic soil group, and soil moisture conditions, so the scale of the land use map will affect the value of the CN calculations. With Geographic Information System makes it possible to combine and analyze the spatial data. In calculating the value of the CN in 2nd order Ciliwung watershed which consists of 14 sub-watersheds are using land use map scale of 1: 250,000, and in 3rd Ciliwung watershed which consists of 126 sub sub-watersheds are using land use map scale of 1: 25.000. Both comparison of weighted-CN value on each sub-watershed do not show any significant differences with the deviation of 0% to 6%."