Penelitian ini bertujuan untuk menganalisis kualitas air Danau Hanjalutung yang berada di Kelurahan Petuk Katimpun, Kota Palangka Raya, Kalimantan Tengah dan membandingkan dengan Standar Baku Mutu Air yang ditetapkan oleh Pemerintah yaitu PP No. 82 Tahun 2001 terutama standard kualitas air untuk Kelas II dan Kelas III. Hasil penelitian menunjukkan bahwa kualitas air (parameter fisika dan kimia) seperti pH, Nitrat, Pospat, BOD, COD, TDS, dan TSS masih dibawah standar baku mutu yang ditetapkan oleh Pemerintah yaitu untuk Kelas II dan Kelas III, sedangkan suhu, kecerahan, kedalaman dan DO masih memenuhi satandar baku mutu untuk Kelas II dan Kelas III.
Danau Hanajalutung merupakan salah satu danau oxbow yang terdapat di Kota Palangka Raya, Provinsi Kalimantan Tengah. Danau tersebut memiliki arti penting bagi penduduk sekitar sebagai tempat melakukan kegiatan perikanan, baik penangkapan maupun kegiatan budidaya. Penelitian yang dilakukan di Danau Hanjalutung untuk mempelajari panjang berat, rasio kelamin dan tingkat kematangan gonad Ikan Tambayuk (Puntius lineatus). Pengambilan sampel ikan dilakukan dengan menggunakan metode survei dengan menggunakan jaring insang dengan ukuran mata jaring 1 inch, 1 1/2 inch, 2 inch dan 21/2 inch. Berdasarkan hasil penelitian, terdapat 9 famili dengan total 916 ekor ikan yang tertangkap. Sedangkan hubungan panjang berat ikan Tambayuk jantan dan betina adalah allometrik negatif atau pertambahan panjang lebih cepat dari pertambahan beratnya dengan nilai b= 1,450. Rasio kelamin antara jantan dan betina adalah rata-rata 46,76%, dan tingkat kematangan gonad tahap II paling banyak teramati. Ikan Tambayuk didominasi oleh tingTKG II, hal ini menunjukkan bahwa ikan Tambayuk yang tertangkap di Danau Hanjalutung pada bulan April dalam tahap pematangan gonad.
This activity was carried out on October 21, 2021 in Tanjung Sangalang and Penda Barania Villages, to provide information to the community in the balangeran revegetation activity and also to conduct a plot demonstration to provide examples of how to increase the growth of Shorea balangeran. As villages that is included in a peat area which is needed to be restorated by the Ministry of the Environment, therefore, the activity that can be developed in both villages was the revegetation of the balangeran plant. The revegetation of the balangeran plant was chosen as one of the Community Work Plans (RKM) in order to restore damaged peatlands in both areas. The unsuccessful revegetation of the balangeran plant carried out by the people in the two villages was caused by the lack of insight and knowledge of the community regarding the proper revegetation system to support the growth of the balangeran plant. Making mounds is one way that can be applied in order to maintain the viability of the balangeran plants in flooded environmental conditions. Balangeran plants that live in flooded areas with a mound system still show good growth. The villages of Tanjung Sangalang and Penda Barania are villages that are often inundated due to floods. To increase the success of revegetation of the balangeran plant, which is a local peat swamp plant and has a high economic value, the planting of balangeran with a mound system is the right system to be applied to the two villages. The training on making mounds in the two villages went smoothly which was attended by the community from representatives of each village.
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