Unit WATERSHED MANAGEMENT FOR LAND PROTECTION

Course
Sustainable agriculture
Study-unit Code
A002209
Curriculum
Territorio e paesaggio
Teacher
Lorenzo Vergni
CFU
10
Course Regulation
Coorte 2021
Offered
2022/23
Type of study-unit
Obbligatorio (Required)
Type of learning activities
Attività formativa integrata

NATURALISTIC ENGINEERING AND SUSTAINABLE URBAN DRAINAGE

Code A002211
CFU 5
Teacher Lorenzo Vergni
Teachers
  • Lorenzo Vergni
Hours
  • 45 ore - Lorenzo Vergni
Learning activities Caratterizzante
Area Discipline della ingegneria agraria
Academic discipline AGR/08
Type of study-unit Obbligatorio (Required)
Language of instruction Italian
Contents Analysis and design of soil bioengineering structures for hillslope and river management. Description and design of natural solutions for sustainable urban drainage management (SuDS) to obtain the hydraulic invariance and to reduce the pollutants discharge in water bodies.
Reference texts - Ferro V. La sistemazione dei bacini idrografici. McGraw-Hill Education, 2006.
- Notes provided by the lecturer.
Educational objectives The course aims to provide students with the knowledge and skills necessary to apply soil bioengineering and sustainable urban drainage techniques to reduce hydrogeological instability and hydraulic risk while protecting nature and landscape. At the end of the course, the student possesses the knowledge and theoretical tools for identifying the most suitable technical solutions according to the topographic, hydrological and land use characteristics.
In particular, the student will be able to know: 1- the characteristics of the materials used in soil bioengineering works. 2-the aims and construction characteristics of the main types of soil bioengineering structures. 3- the contribution of root systems to soil reinforcement. 4- vegetation-current interactions. 5- the aims and characteristics of the main works for sustainable urban drainage systems.
The primary skills will consist in knowing how to: 1-design and size a live crib wall. 2-Evaluate the reduction of sediment production following widespread interventions of soil bioengineering. 3- evaluate the shear strength of soils with the presence of vegetation. 4- design a green roof. 5- design a rain garden. Quantify the lamination effect of floods caused by widespread sustainable drainage interventions in the urban environment.
Behaviours (knowing how to be). 1- Participate actively in the course activities. 2 - Knowing how to identify the most suitable techniques for solving the problems.
Prerequisites The students should have good knowledge of the topics covered in the courses FONDAMENTI DI IDROLOGIA E APPROVVIGIONAMENTO IDRICO and of SISTEMAZIONE DEI VERSANTI E DEI CORSI D’ACQUA
Teaching methods The course is structured as follows: Theoretical lessons dealing with all the issues of the course. The course includes some lessons related to practical training. These are both individual and group exercises that will be sometimes held in the computer room where the students can solve complex or long mathematical calculations by using calculation sheets.
Other information Scheduling of lectures and examinations available at:
http://dsa3.unipg.it/
Learning verification modality The final examination includes an oral exam consisting of a discussion lasting about 40 minutes aimed at ascertaining the level of knowledge and understanding achieved by the student on the theoretical and methodological topics listed in the program. The examination also includes simple exercises and technical calculations. The oral exam will also test the communication skill of the student.
Extended program Soil bioengineering.
History, legislation, design criteria, design, construction phases and choice of materials.
Soil bioengineering techniques for the river management and slope stability.
Design criteria for timber and / or stone check dams. Evaluation of drag resistance in longitudinal works. Most common errors in soil bioengineering works. Anti-erosion and root stabilizing effect. Works for the protection of ichthyofauna (notes).
Interaction between vegetation and free flow currents, evaluations on the roughness coefficients in vegetated riverbeds.
Maintenance of riparian vegetation in order to mitigate the hydraulic risk.
Hydraulic invariance: principle, definition and legislation.
Characterization of soil permeability. Calculation of the flood hydrograph. Definition of the lamination volume, methods and models for calculating the lamination volume.
First flush rain tanks, sizing and management. Green roofs, techniques and materials for design.
Drainage floors, rain gardens, infiltrating trenches, filtering strips, vegetated canals, filtering tree boxes, detention basins.
Calculation of the lamination volume of the individual techniques listed.
Practical lessons
Application of a distributed hydrological model for the evaluation of the impacts on the hydraulic regime following a certain type of intervention.

ACCOMMODATION OF POURS AND WATER COURSES

Code A002210
CFU 5
Teacher Lorenzo Vergni
Teachers
  • Lorenzo Vergni
Hours
  • 45 ore - Lorenzo Vergni
Learning activities Caratterizzante
Area Discipline della ingegneria agraria
Academic discipline AGR/08
Type of study-unit Obbligatorio (Required)
Language of instruction Italian
Contents General characteristics of watershed management and land reclamation. The design of works and structures for: the management of the hydrographic network and the mitigation of the hydraulic risk; the conservation of slopes prone to erosion and instability, also in the agricultural field; nature conservation, landscape protection and forest management.
Reference texts - G. Benini, Sistemazioni idraulico-forestali, UTET 1990
- Ferro V. La sistemazione dei bacini idrografici. McGraw-Hill Education, 2006.
- Notes provided by the lecturer
Educational objectives The course aims to provide students with the knowledge and skills necessary to apply watershed management techniques to protect the territory from instability phenomena and maintain and manage landscape and biodiversity. At the end of the course, the student can use the knowledge and theoretical tools for understanding the main physical-hydrological processes that act in the mountain, hilly and valley areas to prevent and control soil erosion and instability and to adopt the more suitable interventions of both at slope and basin scale. In particular, the student will know: 1- the characteristics of watercourses in terms of solid and water discharge. 2- the fundamental principles governing the sediment transport in watercourses. 3- the hydraulics of free-flowing currents. 4- the concept of stream equilibrium slope. 5- the concept of lamination of floods. 6- phenomenology and factors of water erosion processes and the effects of anthropization.
The main skills will consist in: 1-Quantifying the stream equilibrium slope of a watercourse. 2-Designing structures for river banks protection and river correction (check dams) 3- solve hydraulics problems related to free- flowing currents of a natural watercourse. 4-quantify the lamination effect caused by artificial reservoirs. 5-estimate the soil loss and sediment production at slope and basin scale. 6- make choices on the most suitable systematic interventions in a given context.
Behaviours: 1- active contribution to the course lectures. 2- capability to find suitable technical solutions.


.
Prerequisites The students should have good knowledge of the topics covered in the course FONDAMENTI DI IDROLOGIA E APPROVVIGIONAMENTO IDRICO
Teaching methods The course is structured as follows: Theoretical lessons dealing with all the issues of the course. The course includes some lessons related to practical training. These are both individual and group exercises that will be sometimes held in the computer room where the students can solve complex or long mathematical calculations by using calculation sheets.
Other information Scheduling of lectures and examinations available at:
http://dsa3.unipg.it/
Learning verification modality The final examination includes an oral exam consisting of a discussion lasting about 40 minutes aimed at ascertaining the level of knowledge and understanding achieved by the student on the theoretical and methodological topics listed in the program. The examination also includes simple exercises and technical calculations. The oral exam will also test the communication skill of the student.
Extended program Definitions, objectives, historical notes, application areas of agricultural and forestry hydraulic management.
Sediment transport in streams and qualitative analysis. The theory of incipient motion, equilibrium slope, methodologies and models for the determination of the equilibrium slope.
Hydraulic risk problems concerning the mountain, mid-valley and valley sections of a natural watercourse and possible mitigation interventions.
Techniques and works for the river reclamation. Check dams: types and design criteria. Methods of re-naturalization of the riverbed, structures for river bank protection.
The soil water erosion process: planning and design of soil conservation works. Modelling and quantification of the process and identification of intervention techniques. Application of the USLE and RUSLE models also on a basin scale.
Techniques for soil protection from water erosion and for slope stability. Acquisition of data, information and variables necessary for the design, maintenance or improvement of the works. Acquisition of cartographic-topographical data, the cartography of the National Cartographic Portal and regional cartographies, thematic cartographies hints on the importance of the surveys in the field.
Use of software for evaluating the impact of interventions.
Practical activity. During the practical exercises, problems will be carried out for: the hydraulic check of a natural watercourse, the design of check dams, the quantification of soil loss in a study basin, the estimation of theflood lamination effect due to a small reservoir.
Possible visits to construction sites and meetings with professionals.
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