Year of Issue 2024 General National Id CH_04 Site name Petite Glâne River Basin Summary The case study area “Petite Glâne” belongs to the Broye catchment in the southwestern part of the Swiss Plateau. The river Petite Glâne is about 30 km long, repeatedly crosses borders between the cantons of Vaud and Fribourg, and has a catchment area of 94 km2. Its upper reaches have remained fairly natural and are lined with forest, whereas its lower reaches in the Broye plain have been canalized and straightened. The soils and climate here are highly suitable for arable farming. Overall, the catchment of the Petite Glâne is strongly characterized by agriculture: nearly three quarters of its area consists of pastures and cropland. However, the region is increasingly experiencing water shortages in summer, and there is often not enough water in the Broye and Petite Glâne to irrigate the fields. Climate change will further aggravate the situation. Farmers are therefore considering new options to mitigate the increasing drought events – for example an irrigation project using water from Lake Neuchâtel. Against this background, OPTAIN explores efficient land use and land management strategies as well as technical measures that increase the capacity of soils to absorb and store water while improving nutrient retention and decomposition. These natural and small water retention measures (NSWRMs) are discussed and evaluated jointly with regional stakeholders. Based on model calculations, OPTAIN works to determine the maximum possible water and nutrient retention potential that can be achieved with NSWRMs if they are optimally combined and positioned in the catchment. Although the focus is on the Petite Glâne, the case study extends to the entire Broye catchment when it comes to modelling and stakeholder involvement. The OPTAIN project will support the case study team with identifying and developing efficient land management strategies and small technical solutions to improve the soils’ infiltration and water holding capacities as well as its capacity to filter, buffer and transform pollutants. Project Optain Light or indepth? Light The in-depth description of the case study 2_Petite_Glane_Poster_CDE.pdf Transboundary 0 NWRM(s) implemented in the case study Low till agriculture Strip cropping along contours No till agriculture Optain's measures Maize strip tilling Slope division for erosion control Direct seeding Longitude 6.89970 Latitude 46.83664 Site information Climate zone cool temperate moist Mean annual rainfall 900 - 1200 mm Depth groundwater 5 - 50 m Average slope range moderate (6 - 10%) Monitoring maintenance Monitoring impacts effects 0 Design & implementations Age 10 - 50 years Public consultation 0 Contractural arrangements 0 Design contractual arrangement Arrangement type Responsibility Role Comments Name Design consultation activity Activity stage Key issues Name Comments Design land use change Land use change type Design authority Authority type Role Responsibility Name Comments Lessons, risks, implications... Financing mechanism 0 Success factor(s) Success factor type Success factor role Comments Financing Financing type Comments Barrier Barrier type Barrier role Comments Driver Driver type Driver role Comments Financing share Financing share type Share Comments View Policy, general governance and design targets Policy description Project developed in coordination with the following stakeholders: Authorities of the agricultural sector, authorities of the environment sector, famer associations, local farmers, NGOS, and AGRIDEA Part of wider plan 0 Policy target Target purpose Policy pressure Pressure directive Relevant pressure Policy area Policy area type Policy area focus Name Comments Policy impact Impact directive Relevant impact Policy wider plan Wider plan type Wider plan focus Name Comments Policy requirement directive Requirement directive Specification Photo gallery Full Context Area(aka Level or Site) ALL Crosslinks Pair Record Direct seeding Destination Context NSWRM(Sections) - Default view - ALL - 7474 Crosslink Type Proximity with Pair Record Maize strip tillage Destination Context NSWRM(Sections) - Default view - ALL - 7478 Crosslink Type Proximity with Pair Record Slope division for erosion control Destination Context NSWRM(Sections) - Default view - ALL - 7484 Crosslink Type Proximity with Pair Record Intercropping of grain legumes with cereals Destination Context NSWRM(Sections) - Default view - ALL - 7481 Crosslink Type Proximity with Destination Context Learn About - Real-world Examples - Detailed Case Studies - 462 Crosslink Type Proximity with