scholarly journals An Integrated Agriculture, Atmosphere, and Hydrology Modeling System for Ecosystem Assessments

2019 ◽  
Vol 11 (12) ◽  
pp. 4645-4668 ◽  
Author(s):  
L. Ran ◽  
Y. Yuan ◽  
E. Cooter ◽  
V. Benson ◽  
D. Yang ◽  
...  
Keyword(s):  
Integrated Agriculture ◽  
Ecosystem Assessments ◽  
Hydrology Modeling

scholarly journals Using Integrated Ecosystem Assessments to Build Resilient Ecosystems, Communities, and Economies

2021 ◽  
Vol 49 (1) ◽  
pp. 26-45
Author(s):  
Ellen Spooner ◽  
Mandy Karnauskas ◽  
Chris J. Harvey ◽  
Chris Kelble ◽  
Judith Rosellon-Druker ◽  
...  
Keyword(s):  
Ecosystem Assessments

Air-water Interface: Tropical Lake Diatoms and Isotope Hydrology Modeling

2020 ◽  
pp. 213-218
Author(s):  
Florence Sylvestre ◽  
Françoise Gasse ◽  
Françoise Vimeux ◽  
Benjamin Quesada
Keyword(s):  
Tropical Lake ◽  
Water Interface ◽  
Isotope Hydrology ◽  
Air Water Interface ◽  
Hydrology Modeling

scholarly journals SHaKTI: Subglacial Hydrology and Kinetic Transient Interactions v1.0

2018 ◽  
Author(s):  
Aleah Sommers ◽  
Harihar Rajaram ◽  
Mathieu Morlighem
Keyword(s):  
Water Pressure ◽  
Ice Sheet ◽  
Governing Equations ◽  
Model Formulation ◽  
Seasonal Behavior ◽  
Wide Transition ◽  
Transient Interactions ◽  
Ice Sheet Dynamics ◽  
Hydrology Modeling ◽  
Single Set

Abstract. Subglacial hydrology has a significant influence on ice sheet dynamics, yet remains poorly understood. Complex feedbacks play out between the liquid water and the ice, with constantly changing drainage geometry and flow mechanics. A clear tradition has been established in the subglacial hydrology modeling literature of distinguishing between channelized (efficient) and distributed (inefficient) drainage systems or components. Imposing a distinction that changes the governing physics under different flow regimes, however, may not allow for the full array of drainage characteristics to arise. Here, we present a new subglacial hydrology model: SHaKTI (Subglacial Hydrology and Kinetic Transient Interactions). In this model formulation, a single set of governing equations is applied over the entire domain, with a spatially and temporally varying transmissivity that allows for representation of the wide transition between turbulent and laminar flow, and the geometry of each element is allowed to evolve accordingly to form sheet and channel configurations. The model is implemented as a solution in the Ice Sheet System Model (ISSM). We include steady and transient examples to demonstrate features and capabilities of the model, and we are able to reproduce seasonal behavior of the subglacial water pressure that is consistent with observed seasonal velocity behavior in many Greenland outlet glaciers, supporting the notion that subglacial hydrology may be a key influencer in shaping these patterns.

scholarly journals Culturally diverse expert teams have yet to bring comprehensive linguistic diversity to intergovernmental ecosystem assessments

One Earth ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 269-278
Author(s):  
Abigail J. Lynch ◽  
Álvaro Fernández-Llamazares ◽  
Ignacio Palomo ◽  
Pedro Jaureguiberry ◽  
Tatsuya Amano ◽  
...  
Keyword(s):  
Culturally Diverse ◽  
Linguistic Diversity ◽  
Ecosystem Assessments

scholarly journals The effect of land uses to change on infiltration capacity and surface runoff at latung sub watershed, Padang City Indonesia

2021 ◽  
Vol 331 ◽  
pp. 08002
Author(s):  
Rusli HAR ◽  
Aprisal ◽  
Werry Darta Taifur ◽  
Teguh Haria Aditia Putra
Keyword(s):  
Land Use ◽  
Surface Runoff ◽  
Land Use Changes ◽  
Curve Number ◽  
Soil Infiltration ◽  
Infiltration Capacity ◽  
Rainwater Infiltration ◽  
Double Ring ◽  
Hydrology Modeling ◽  
Runoff Discharge

Changes in land use in the Air Dingin watershed (DAS) area in Padang City, Indonesia, lead to a decrease in rainwater infiltration volume to the ground. Some land use in the Latung sub-watershed decrease in infiltration capacity with an increase in surface runoff. This research aims to determine the effect of land-use changes on infiltration capacity and surface runoff. Purposive sampling method was used in this research. The infiltration capacity was measured directly in the field using a double-ring infiltrometer, and the data was processed using the Horton model. The obtained capacity was quantitatively classified using infiltration zoning. Meanwhile, the Hydrologic Engineering Center - Hydrology Modeling System with the Synthetic Unit Hydrograph- Soil Conservation Service -Curve Number method was used to analyze the runoff discharge. The results showed that from the 13 measurement points carried out, the infiltration capacity ranges from 0.082 - 0.70 cm/minute or an average of 0.398 cm/minute, while the rainwater volume is approximately 150,000 m3/hour/km2. Therefore, the soil infiltration capacity in the Latung sub-watershed is in zone VI-B or very low. This condition had an impact on changes in runoff discharge in this area, from 87.84 m3/second in 2010 to 112.8 m3/second in 2020 or a nail of 22.13%. Based on the results, it is concluded that changes in the land led to low soil infiltration capacity, thereby leading to an increase in surface runoff.

scholarly journals Sistem Pertanian Terintegrasi – Simantri: Konsep, Pelaksanaan, dan Perannya dalam Pembangunan Pertanian di Provinsi Bali

2014 ◽  
Vol 32 (2) ◽  
pp. 157 ◽  
Author(s):  
Iwan Setiajie Anugrah ◽  
Sarwititi Sarwoprasodjo ◽  
Kedi Suradisastra ◽  
Ninuk Purnaningsih
Keyword(s):  
Local Governments ◽  
Zero Waste ◽  
Total Budget ◽  
Self Reliance ◽  
Integrated Agriculture ◽  
Job Opportunity ◽  
Commercial Purpose ◽  
Group Members ◽  
Priority Program ◽  
Meet Group

<p><strong>English</strong><br />Integrated agriculture system (Simantri) is one of the priority program in Bali Province in order to enhance agricultural sector’s role to support Bali Mandara. This paper aims to describe potency, opportunity, and support of the local governments to empower farmers through Simantri program. This program is initiated Bali Governor (2008-2013) and based on Prima Tani model. Simantri was initially started in 2009 in 10 sites of the Gapoktans’ demonstration plots in 7 regencies. Durineg the period of 2009-2013 Simantri developed into 400 sites out of 1,000 targeted sites in 2018 in 9 regencies/cities. Total budget spent by Bali Government Province for Simantri 2009-1013 was more than Rp 8 billion from social assistance and CSR funds. Simantri enhances relation among farm activities and utilizes farm wastes inside the groups. Simantri orients its activities based on agriculture without waste or zero waste and produces 4 F (Food, Feed, Fertilizer and Fuel). Livestock-farm integration implemented by Simantri boosts farmers’ group business, job opportunity, and supplies of food, feed, fertilizer, organic pesticide, and bio gas to meet group members’ demand and for commercial purpose supported by local governments. In the future it is expected that Simantri becomes an integrated agriculture-energy program for food self-reliance and farmers’ welfare. It is as also expected that this program sustains regardless the changes in local government leaders and all attached policies.</p><p> </p><p><strong>Indonesian</strong><br />Sistem pertanian terintegrasi (Simantri) merupakan salah satu program unggulan daerah Pemprov Bali untuk peningkatan peran sektor pertanian mendukung Bali Mandara. Makalah ini bertujuan mendeskripsikan tentang potensi, peluang, dan dukungan kebijakan pemerintah daerah terhadap sekor pertanian untuk kesejahteran petani melalui program Simantri. Inisiasi kegiatan didasarkan pada ide, gagasan, dan pemikiran Gubernur Bali (2008-2013) dan model Prima Tani. Implementasi Simantri dimulai tahun 2009 pada 10 lokasi percontohan Gapoktan Simantri di 7 kabupaten. Perkembangan Simantri 2009-2013 telah mencapai 400 lokasi, dari target 1000 lokasi Simantri tahun 2018 di 9 kabupaten/kota. Jumlah anggaran Pemprov Bali untuk kegiatan Simantri (2009-2013) mencapai lebih dari Rp80 miliar dalam bentuk bansos dan CSR. Konsep Simantri selain memberdayakan hubungan fungsi masing-masing kegiatan juga mendorong pada pemanfaatan limbah pertanian dan ternak menjadi komponen pendukung integrasi di tingkat kelompok Simantri. Kegiatan ini berorientasi pada usaha pertanian tanpa limbah (zero waste) dan menghasilkan 4 F (food, feed, fertilizer, dan fuel). Beberapa hasil penelitian terkait dengan Simantri di Provinsi Bali menunjukkan bahwa pelaksanaan pola integrasi tanaman ternak di lokasi Simantri telah memberikan dampak pada tumbuhnya kegiatan usaha kelompok, lapangan pekerjaan, pemenuhan kebutuhan pangan, pakan, pupuk dan pestisida organik serta biogas di tingkat kelompok maupun untuk tujuan komersial melalui dukungan kebijakan pemda setempat. Potensi, peluang, dan dukungan kebijakan dalam pelaksanaan kegiatan Simantri diharapkan menjadi embrio bagi keberlanjutan program pembangunan sektor pertanian daerah menuju sistem pertanian energi terpadu untuk kemandirian pangan dan kesejahteraan petani. Dengan asumsi bahwa keberlanjutan program ini tidak terdistorsi oleh proses pergantian pimpinan daerah dan kepentingan kebijakan yang menyertainya.</p>

A case study of Hangere integrated agriculture-aquaculture farm in Malawi.

2020 ◽  
Author(s):  
Kingsley M Kamtambe ◽  
Jeremiah Kang'ombe ◽  
Emmanuel Kw Kaunda
Keyword(s):  
Clarias Gariepinus ◽  
Cash Flows ◽  
Water Levels ◽  
Small Scale ◽  
Sweet Potatoes ◽  
Rhodes Grass ◽  
Aquaculture Farm ◽  
Integrated Agriculture ◽  
Hot Dry Season

Abstract The case study was undertaken to assess performance and sustainability of Hangere Agriculture-Aquaculture Integrated Farm. Data was collected during a seven-day visit at the farm (carried out on 7-14 June 2009), using a semi-structured questionnaire with open ended questions and a study of farm records and cash flows. Direct observations of farm operations were also reported. Hangere integrated agriculture-aquaculture farm is located in Mzuzu City, Mzimba District, Malawi and belongs to 37-year-old Mrs Liness Chavula. The farm has a total land holding of approximately 13 ha. Of this area, only 2.2 ha are used for aquaculture with three drainable ponds with a total area of 1804 m2. Of the remaining area, 4 ha are used for maize cultivation, 1.5 ha for growing sweet potatoes, and 1 ha is used for vegetables, including cassava and Rhodes grass Chloris gayana. The farm holds Tilapia rendalli and Oreochromis karongae in polyculture and Clarias gariepinus in monoculture. The fish are fed formulated diets and the ponds are fertilized with livestock manure. The fish are harvested three times yearly and are sold to wholesalers and retail with prices of K450/kg (US $3.21) and K500/kg (US $3.5), respectively. Pigs, goats and a dairy cow are also kept on the farm. In 2008 the farm made a profit of K289,000 (US $2,064), from the sale of field crops, livestock and fish. Of the K289,000 of profit, K100,000 (US $714) came from fish sales while K70,000 (US $500) came from maize sales, K28,000 (US $200) from pig sales and K50,000 (US $357) from sweet potatoes. The farm faces several challenges including labour shortages, absence of a hatchery facility for fingerling production and lack of available extension services. The farm experiences low water levels during the hot-dry season and pest infestation in the pond vicinity, both of which lower production. Hangere farm operates at a semi-intensive level, being integrated with other on-farm agriculture activities, and is a typical example of a small scale fish farm in Malawi. The farm has also begun cultivating new crops, mainly coffee and wheat, both of which are highly priced cash crops in Malawi. C. gariepinus (catfish) has also been introduced in ponds at the farm with the potential to reach 1 kg in body weight in 6 months.

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