1.2 Contact details of resource persons and institutions involved in the assessment and documentation of the Technology

Name of project which facilitated the documentation/ evaluation of the Technology (if relevant)

Name of the institution(s) which facilitated the documentation/ evaluation of the Technology (if relevant)

1.3 Conditions regarding the use of data documented through WOCAT

The compiler and key resource person(s) accept the conditions regarding the use of data documented through WOCAT:

Yes

1.4 Declaration on sustainability of the described Technology

Is the Technology described here problematic with regard to land degradation, so that it cannot be declared a sustainable land management technology?

No

1.5 Reference to Questionnaire(s) on SLM Approaches (documented using WOCAT)

Farmer own initiated water harvesting pond in the … [Bangladesh]

This is an indigenous approach to store rain water for irrigating rice and other crops in the hillside earthen dam.

• Compiler: Tuku Talukder
• 12/31/2008 midnight

2.1 Short description of the Technology

Definition of the Technology:

Sediment capture ponds are constructed and located along networks of ditches which drain watersheds. They slow the velocity of water and cause the deposition of suspended materials. These ponds help to avoid sediment accumulation in the ditches themselves, and can decrease sediment and nutrient pollution of surface water bodies downstream.

2.2 Detailed description of the Technology

Description:

Sediment capture ponds are designed to be able to retain runoff water during rainy periods. They are located along networks of ditches which drain watersheds – and are constructed through mechanical excavation. The technology is usually applied in hilly areas, but sometimes downstream ponds are located in or near urban zones. The ponds slow the velocity of water and cause deposition of suspended materials. They help to avoid sediment accumulation in the ditches themselves, and can decrease sediment and nutrient pollution of surface water bodies downstream. Water retention in the upstream area results in better infiltration and provides a source of water for wildlife. As sediment is regularly deposited in the ponds, they need to be desilted to maintain effectiveness.

2.3 Photos of the Technology

2.4 Videos of the Technology

2.5 Country/ region/ locations where the Technology has been applied and which are covered by this assessment

Country:

Hungary

Region/ State/ Province:

Zala County

Further specification of location:

Esztergályhorváti

Specify the spread of the Technology:

• applied at specific points/ concentrated on a small area

Is/are the technology site(s) located in a permanently protected area?

No

Map

×

2.6 Date of implementation

If precise year is not known, indicate approximate date:

• 10-50 years ago

2.7 Introduction of the Technology

Specify how the Technology was introduced:

• through projects/ external interventions

Comments (type of project, etc.):

A project supported the management of the catchment area to improve municipal security and recreation.

3.1 Main purpose(s) of the Technology

• reduce, prevent, restore land degradation
• protect a watershed/ downstream areas – in combination with other Technologies
• reduce risk of disasters
• mitigate climate change and its impacts
• create beneficial social impact

3.2 Current land use type(s) where the Technology is applied

Land use mixed within the same land unit:

No

Cropland

• Annual cropping

Annual cropping - Specify crops:

• cereals - barley
• cereals - maize
• cereals - wheat (winter)
• oilseed crops - sunflower, rapeseed, other

Number of growing seasons per year:

• 1

Is intercropping practiced?

Yes

If yes, specify which crops are intercropped:

cover crops are grown between cash crops

Is crop rotation practiced?

Yes

If yes, specify:

oilseed rape - winter wheat - maize - spring barley

3.3 Has land use changed due to the implementation of the Technology?

Has land use changed due to the implementation of the Technology?

• No (Continue with question 3.4)

Land use mixed within the same land unit:

No

3.4 Water supply

Water supply for the land on which the Technology is applied:

• rainfed

3.5 SLM group to which the Technology belongs

• water harvesting
• surface water management (spring, river, lakes, sea)
• wetland protection/ management

3.6 SLM measures comprising the Technology

structural measures

• S5: Dams, pans, ponds

3.7 Main types of land degradation addressed by the Technology

water degradation

• Hp: decline of surface water quality

3.8 Prevention, reduction, or restoration of land degradation

Specify the goal of the Technology with regard to land degradation:

• prevent land degradation
• adapt to land degradation

4.1 Technical drawing of the Technology

Technical specifications (related to technical drawing):

Larger sedimentation ponds can be several square kilometers in size, while others are only a few tens or hundreds of square meters. Generally, the size of sedimentation ponds depends on the characteristics of the surrounding area, the amount and frequency of rainfall, and the sources of water supply to the pond. The depth of a sedimentation pond can also vary depending on its purpose and location. In general, sedimentation ponds are designed to have a shallow depth, typically around 1 to 3 meters.

Author:

Piroska Kassai

Date:

17/04/2023

4.2 General information regarding the calculation of inputs and costs

Specify how costs and inputs were calculated:

• per Technology unit

Specify currency used for cost calculations:

• USD

4.3 Establishment activities

4.4 Costs and inputs needed for establishment

If you are unable to break down the costs in the table above, give an estimation of the total costs of establishing the Technology:

1420000.0

If land user bore less than 100% of costs, indicate who covered the remaining costs:

costs were covered by public and municipal funds

4.5 Maintenance/ recurrent activities

4.6 Costs and inputs needed for maintenance/ recurrent activities (per year)

If you are unable to break down the costs in the table above, give an estimation of the total costs of maintaining the Technology:

40000.0

4.7 Most important factors affecting the costs

Describe the most determinate factors affecting the costs:

amount of sediments, topographical conditions

5.1 Climate

5.2 Topography

Indicate if the Technology is specifically applied in:

• concave situations

Comments and further specifications on topography:

landscape is hilly and different land use patterns (arable land, ward and forest) are mixed in the area

5.3 Soils

If available, attach full soil description or specify the available information, e.g. soil type, soil PH/ acidity, Cation Exchange Capacity, nitrogen, salinity etc.

Soil type is Luvisol

5.4 Water availability and quality

Is water salinity a problem?

No

Is flooding of the area occurring?

No

Comments and further specifications on water quality and quantity:

source of pollution is agriculture (manure, fertilisers, pesticides)

5.5 Biodiversity

5.6 Characteristics of land users applying the Technology

Indicate other relevant characteristics of the land users:

The pond was built by communal and local water authority collaboration.

5.7 Average area of land used by land users applying the Technology

5.8 Land ownership, land use rights, and water use rights

Land ownership:

• individual, not titled
• individual, titled

Land use rights:

• leased
• individual

Water use rights:

• communal (organized)

Are land use rights based on a traditional legal system?

Yes

5.9 Access to services and infrastructure

6.1 On-site impacts the Technology has shown

Socio-economic impacts

Water availability and quality

Socio-cultural impacts

Ecological impacts

Water cycle/ runoff

Soil

Biodiversity: vegetation, animals

Climate and disaster risk reduction

6.2 Off-site impacts the Technology has shown

6.3 Exposure and sensitivity of the Technology to gradual climate change and climate-related extremes/ disasters (as perceived by land users)

Gradual climate change

Gradual climate change

Climate-related extremes (disasters)

Hydrological disasters

6.4 Cost-benefit analysis

How do the benefits compare with the establishment costs (from land users’ perspective)?

How do the benefits compare with the maintenance/ recurrent costs (from land users' perspective)?

Comments:

These ponds are not generally constructed by land users, but by municipalities using grants/subsidies. Therefore, it is a very cost-effective solution from land users perspective in both the short and long term.

6.5 Adoption of the Technology

• single cases/ experimental

Of all those who have adopted the Technology, how many did so spontaneously, i.e. without receiving any material incentives/ payments?

• 0-10%

Comments:

zero

6.6 Adaptation

Has the Technology been modified recently to adapt to changing conditions?

No

6.7 Strengths/ advantages/ opportunities of the Technology

6.8 Weaknesses/ disadvantages/ risks of the Technology and ways of overcoming them

7.1 Methods/ sources of information

7.2 References to available publications

Title, author, year, ISBN:

Ponds - Planning, Design, Construction (Agriculture Handbook 590), USDA, ISBN 9781365086069

Available from where? Costs?

enbook.hu, 25 USD

7.3 Links to relevant online information

Title/ description:

European NWRM Platform

URL:

http://nwrm.eu/measures-catalogue

7.4 General comments

Questionnaire is very detailed