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Optimization of Water Utilization Through the Application of Hydropande Technology to Meet Clean Water and Agricultural Needs in Timuhun Village, Banjarangkan District, Klungkung Regency I Komang Ery Kusnada; I Ketut Sudiarta; I Gusti Agung Putu Eryani; Yohanes Parlindungan Situmeang; Dewa Nyoman Sudita; Nengah Muliarta
Agriwar Journal Vol. 4 No. 2 (2024): Agriwar Journal
Publisher : Program Studi Magister Sains Pertanian Program Pascasarjana Universitas Warmadewa

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Abstract

Timuhun Village, located in Banjarangkan District, Klungkung Regency, covers an area of 375 hectares with a population of 3,334 in 2021. Approximately 86.67% of the total land is utilized for agriculture, including rice fields, gardens, and dry fields, with a total agricultural area of 325 hectares. This village plays a significant role in food production, especially rice, supported by the irrigation system from Subak Timuhun, which utilizes the Manik Tirta Spring. However, challenges in water management arise due to the higher elevation of agricultural land compared to water sources, leading to difficulties in meeting the demands for clean water and irrigation. The Appropriate Technology of Hidropande is introduced as a solution to lift water from lower sources. This study aims to develop an integrated water management model by analyzing the residual water volume from the Manik Tirta Spring, determining the irrigation requirements for the paddy-cassava-paddy cropping pattern, and planning optimal water management strategies. Utilizing CROPWAT 8.0 software, this research estimates the water needs of crops based on various climatic and soil parameters. The results indicate that the highest irrigation water requirement reaches 41 mm/decade in December, while the lowest demand of 6.8 mm/decade occurs during the maturation phase of the plants. With calculations showing surplus residual water of 1.97 liters/second, the potential discharge from the Manik Tirta Spring can be maximized to support irrigation and meet clean water needs, alongside plans for developing a more efficient Hidropande pump. This study provides valuable insights into sustainable water management in Timuhun Village.
Ecological diagnosis of Lake Batur (Bali, Indonesia) post-disturbance using multimetric phytoplankton indices SANG AYU MADE PUTRI SURYANI; I GEDE SUDIARTA; NI MADE DARMADI; DEWA GEDE SEMARA EDI; I KETUT SUDIARTA; GEDE AGUS SURYA PRATAMA; I MADE ABDI JANAGUNA; I PUTU SUGIANA
Biodiversitas Journal of Biological Diversity Vol. 26 No. 10 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d261014

Abstract

Abstract. Suryani SAMP, Sudiarta IG, Darmadi NM, Edi DGS, Sudiarta IK, Pratama GAS, Janaguna IMA, Sugiana IP. 2025. Ecological diagnosis of Lake Batur (Bali, Indonesia) post-disturbance using multimetric phytoplankton indices. Biodiversitas 26: 4982-4990. Plankton communities are rapid responders to environmental change and serve as sensitive indicators of ecological stress in tropical volcanic lakes. In July 2025, Lake Batur (Bali, Indonesia) experienced a major fish mortality linked to hypolimnetic upwelling and nutrient enrichment from aquaculture. To assess post-disturbance conditions, we sampled three sites with varying aquaculture intensity—Seked (low), Buahan (moderate), and Trunyan (high, mortality epicenter)—one week after the event. Field measurements included temperature, pH, dissolved oxygen, conductivity, redox potential, nutrients, and sulfide, while phytoplankton analysis covered diversity (Shannon–Wiener), evenness (Pielou), dominance (Simpson), and saprobity (Dahuri). Results revealed clear spatial contrasts. Trunyan showed the strongest stress signals, with oxygen depletion, negative redox potential, and elevated ammonia, while Seked and Buahan displayed milder alterations. In total, 23 phytoplankton genera were identified, dominated by diatoms such as Ulnaria and Actinotaenium. Trunyan exhibited reduced richness, lower diversity (H’ = 1.84), and higher dominance (D = 0.27), indicating a shift toward opportunistic taxa. Saprobity values showed a gradient of organic pollution, increasing from Seked (1.5) to Trunyan (2.0), consistent with aquaculture intensity. These findings highlight the value of integrating multimetric plankton indices with physicochemical data to distinguish natural upwelling effects from anthropogenic nutrient loading. While diatom persistence suggests some resilience, recovery of sensitive taxa depends on reducing nutrient inputs and regulating aquaculture. This integrative framework offers a practical diagnostic tool for adaptive lake management and contributes to achieving clean water, climate action, and aquatic biodiversity goals.
Co-Authors Angels, Jeannel Faustina Elvira Antara, I Dewa Ketut Adi Arya Sanjaya, I Made Constantein Petta Desita Anggraheni, Ayu Surya Dewa Gede Semara Edi, Dewa Gede Semara Dianti, Desak Putu Dimas Imaniar Dwipayana, Kadek Ary Gayatri, Dewa Ayu Kirana Gede Agus Surya Pratama Gede Arya Bagus Arisudhana Hermanto, Bagus I Dewa Nyoman Sudita, I Dewa I Gede Sudiarta I Gust i Ngurah Wairocana I Gusti Agung Putu Eryani I Komang Ery Kusnada I Made Abdi Janaguna I Made Suwitra I Nengah Muliarta, I Nengah I Ngurah Suryawan I Ngurah Suryawan I Nyoman Dodik Prasetia I Putu Suhartika I Wayan Restu Jonathan, Felix Kadek Agus Sudiarawan Khoiriya, Evi Ismu Komang Srititin Agustina Layang, I Wayan Bela Siki Made Pande Lilik Lestari, Made Pande Lilik Martana, Putu Ade Hariestha Ni Luh Putu Mira Santana Sari Ni Made Darmadi Ni Putu Premierita Haryanti Niko Pahlevi Hentika Nyoman Utari Vipriyanti Palguna, Kadek Dwi Paraniyati Dewi, Ni Putu Partama, I GD Yudha Pemayun, Cokorde Gde Putra Purnamasari, Kadek Ratih Putu Ayu Lestarini Putu Edi Yastika Putu Indah Dianti Putri Rahmadi Prasetijo Ramos, Dircia De Aquino Sang Ayu Made Putri Suryani, Sang Ayu Made Putri Santana Sari, Ni Luh Putu Mira Saputra, I Kadek Dwi Arta Sari, Ni Luh Putu Mira Santana Sugiana, I Putu Sulaksana, Bagus Alit Triguna Sumpeno, Fajar Suryo Suparwata, I Wayan Eka Surya Timur, Marcellino Ananta Teguh Oprandi, I Made Stefanus Trie Anggita, Ni Komang Hima Yohanes Parlindungan Situmeang Yuniarti, Lucia Yuniarti, Lucia Ni Luh Zefanya, Dewa Kadek Michel Habel