技术

Firebreaks [塞内加尔]

Pare-feux (French)

technologies_1615 - 塞内加尔

完整性: 69%

1. 一般信息

1.2 参与该技术评估和文件编制的资源人员和机构的联系方式

关键资源人

SLM专业人员:
SLM专业人员:

Dorlöchter-Sulser Sabine

Misereor

德国

SLM专业人员:

Daniel André

Ministère des Eaux et Forêts, Senegal

塞内加尔

有助于对技术进行记录/评估的项目名称(如相关)
Manual of Good Practices in Small Scale Irrigation in the Sahel (GIZ )
有助于对技术进行记录/评估的机构名称(如相关)
Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) - 德国
有助于对技术进行记录/评估的机构名称(如相关)
Misereor - 德国
有助于对技术进行记录/评估的机构名称(如相关)
Direction des Eaux et Forêts, Chasses et de la conservation des Sols - 塞内加尔

1.3 关于使用通过WOCAT记录的数据的条件

编制者和关键资源人员接受有关使用通过WOCAT记录数据的条件。:

2. SLM技术的说明

2.1 技术简介

技术定义:

Firebreaks cut vast tracts of rangeland into smaller areas, with a view to limiting damage in the event of wildfire.

2.2 技术的详细说明

说明:

This technique is used on rangeland with rainfall between 150 and 300 mm. Firebreaks are a precautionary measure designed to protect forage on rangelands during the dry season. Bushfires are frequent on good-quality rangeland with over 1t/ha of biomass.

Purpose of the Technology: Firebreaks cut vast tracts of rangeland into smaller areas, with a view to limiting damage in the event of wildfire. They can also be established along traditional tracks. The gap in the vegetation makes it easier to put fires out along the corridor, which facilitates rapid access. When the fire reaches the firebreak, there is no combustible material to fuel it and it burns itself out.

Establishment / maintenance activities and inputs: There are two techniques for creating firebreaks: (i) the manual method and (ii) the mechanised method. In both cases, a 10 to 15 m wide corridor is cleared perpendicular to the prevailing wind direction after the rainy season. Fires only poses a threat in the Sahel area in the dry season following a good rainy season when grass growth is good. The corridor is cleared of all herbaceous vegetation manually, using tools such as rakes, shovels and axes, or mechanically using a tractor pulling a large harrow, a four-wheel-drive vehicle pulling the blades behind it or graders. Trees are pruned, but left in place.
The sustainability of firebreaks depends on how well they are maintained. Once they have been created, they need to be cleared every year if grasses have grown over them again. If there is little vegetation growth, they can
be maintained once every two years or as required. If they are cleared manually, the communities or commune authorities must be well organised to ensure that the work is properly carried out. Good organisation is also required to ensure an effective response in the event of a fire (mobile unit).

2.3 技术照片

2.5 已应用该技术的、本评估所涵盖的国家/地区/地点

国家:

塞内加尔

区域/州/省:

Senegal

有关地点的进一步说明:

Ferlo Region

具体说明该技术的分布:
  • 均匀地分布在一个区域
如果不知道精确的区域,请注明大致覆盖的区域:
  • 100-1,000 平方千米

2.6 实施日期

如果不知道确切的年份,请说明大概的日期:
  • 10-50年前

2.7 技术介绍

详细说明该技术是如何引入的:
  • 通过项目/外部干预
注释(项目类型等):

Developed in other countries. Implemented and disseminated as part of projects and programmes undertaken from the 1980s onwards. Implemented by GIZ (German Federal Enterprise for International Cooperation): Projet PASP (Projet d‘Autopromotion Pastorale dans le Ferlo - Project to Promote Self-Help of Pastoralists in the Ferlo Region) in Northern Senegal.

3. SLM技术的分类

3.1 该技术的主要目的

  • 降低灾害风险

3.2 应用该技术的当前土地利用类型

牧场

牧场

注释:

Major land use problems (compiler’s opinion): Bushfires are frequent on good-quality rangeland with over 1t/ha of biomass; bushfire only poses a threat in the Sahel area in the dry season following a good rainy season when grass growth is good.

Constraints of common grazing land

Constraints of forested government-owned land or commons

Number of growing seasons per year: 1
Longest growing period in days: 120 Longest growing period from month to month: August to October

3.5 该技术所属的SLM组

  • 减少基于生态系统的灾害风险

3.6 包含该技术的可持续土地管理措施

植物措施

植物措施

  • V3:植被的清理
注释:

Main measures: vegetative measures

3.7 该技术强调的主要土地退化类型

生物性退化

生物性退化

  • Bc:植被覆盖的减少
  • Bf:火灾的有害影响
注释:

Main type of degradation addressed: Bf: detrimental effects of fires

Secondary types of degradation addressed: Bc: reduction of vegetation cover

Main causes of degradation: other human induced causes (specify) (man made fires, natural flashes during thunderstorms), droughts

3.8 防止、减少或恢复土地退化

具体数量名该技术与土地退化有关的目标:
  • 防止土地退化

4. 技术规范、实施活动、投入和成本

4.1 该技术的技术图纸

技术规范(与技术图纸相关):

Technical knowledge required for field staff / advisors: moderate

Technical knowledge required for land users: low

Main technical functions: control of fires, reduction of dry material (fuel for wildfires)

Vegetative measure: clearing of vegetation
Vegetative material: G : grass

Vegetative measure: Vegetative material: G : grass

Vegetative measure: Vegetative material: G : grass

Vegetative measure: Vegetative material: G : grass

4.3 技术建立活动

活动 时间(季度)
1. A 10 to 15 m wide corridor is cleared perpendicular to the prevailing wind direction after the rainy season of all herbaceous vegetation manually, using tools such as rakes, shovels and axes, or mechanically using a tractor pulling a large harrow, a four- wheel-drive vehicle pulling the blades behind it or graders.
2. Trees are pruned, but left in place

4.5 维护/经常性活动

活动 时间/频率
1. Once they have been created, they need to be cleared every year if grasses have grown over them again. If there is little vegetation growth, they can be maintained once every two years or as required.

4.7 影响成本的最重要因素

描述影响成本的最决定性因素:

Manual method:
• equipment, such as rakes, shovels and axes
• labour.
Mechanised method:
• four-wheel-drive vehicle, tractor or land grader
• harrow
• labour to clear the corridor.

5. 自然和人文环境

5.1 气候

年降雨量
  • < 250毫米
  • 251-500毫米
  • 501-750毫米
  • 751-1,000毫米
  • 1,001-1,500毫米
  • 1,501-2,000毫米
  • 2,001-3,000毫米
  • 3,001-4,000毫米
  • > 4,000毫米
农业气候带
  • 半干旱

Thermal climate class: subtropics

5.2 地形

平均坡度:
  • 水平(0-2%)
  • 缓降(3-5%)
  • 平缓(6-10%)
  • 滚坡(11-15%)
  • 崎岖(16-30%)
  • 陡峭(31-60%)
  • 非常陡峭(>60%)
地形:
  • 高原/平原
  • 山脊
  • 山坡
  • 山地斜坡
  • 麓坡
  • 谷底
垂直分布带:
  • 0-100 m a.s.l.
  • 101-500 m a.s.l.
  • 501-1,000 m a.s.l.
  • 1,001-1,500 m a.s.l.
  • 1,501-2,000 m a.s.l.
  • 2,001-2,500 m a.s.l.
  • 2,501-3,000 m a.s.l.
  • 3,001-4,000 m a.s.l.
  • > 4,000 m a.s.l.
关于地形的注释和进一步规范:

Slopes on average: Also moderate (6-10%)

5.3 土壤

平均土层深度:
  • 非常浅(0-20厘米)
  • 浅(21-50厘米)
  • 中等深度(51-80厘米)
  • 深(81-120厘米)
  • 非常深(> 120厘米)
土壤质地(表土):
  • 中粒(壤土、粉土)
  • 细粒/重质(粘土)
如有可能,附上完整的土壤描述或具体说明可用的信息,例如土壤类型、土壤酸碱度、阳离子交换能力、氮、盐度等。:

Soil fertility: Medium and low
Soil drainage/infiltration: Medium and poor
Soil water storage capacity: Medium and low

5.4 水资源可用性和质量

地下水位表:

5-50米

地表水的可用性:

中等

关于水质和水量的注释和进一步规范:

Ground water table: 5-50m ( > 10 m)
Availability of surface water: Medium (surface runoff generated by limited but intense rainfalls)

5.5 生物多样性

物种多样性:

5.6 应用该技术的土地使用者的特征

相对财富水平:
  • 非常贫瘠
  • 贫瘠
性别:
  • 男人
说明土地使用者的其他有关特征:

Population density: 10-50 persons/km2

Annual population growth: 3% - 4%

(mostly poor households below poverty line).

Off-farm income specification: men migrate temporarily or permanently to cities for off-farm income

5.7 应用该技术的土地使用者使用的平均土地面积

  • < 0.5 公顷
  • 0.5-1 公顷
  • 1-2 公顷
  • 2-5公顷
  • 5-15公顷
  • 15-50公顷
  • 50-100公顷
  • 100-500公顷
  • 500-1,000公顷
  • 1,000-10,000公顷
  • > 10,000公顷
这被认为是小规模、中规模还是大规模的(参照当地实际情况)?:
  • 小规模的

5.8 土地所有权、土地使用权和水使用权

土地所有权:
土地使用权:
  • 社区(有组织)
用水权:
  • 社区(有组织)
注释:

traditional land use rights on fields, communal land on pasture and forest land

5.9 进入服务和基础设施的通道

健康:
  • 贫瘠
  • 适度的
教育:
  • 贫瘠
  • 适度的
技术援助:
  • 贫瘠
  • 适度的
就业(例如非农):
  • 贫瘠
  • 适度的
市场:
  • 贫瘠
  • 适度的
能源:
  • 贫瘠
  • 适度的
道路和交通:
  • 贫瘠
  • 适度的
饮用水和卫生设施:
  • 贫瘠
  • 适度的
金融服务:
  • 贫瘠
  • 适度的

6. 影响和结论性说明

6.1 该技术的现场影响

社会经济效应

生产

生产故障风险

增加
降低
收入和成本

工作量

增加
降低
其它社会经济效应

Establishment and maintenance costs

high
low

社会文化影响

冲突缓解

恶化
改良

Improved livelihoods and human well-being

decreased
increased
注释/具体说明:

Preventing wildfire contributes to safeguarding the fauna and flora over vast tracts of rangeland, which would otherwise be destroyed. It also avoids enormous economic losses in terms of livestock and infrastructure (herding villages, forage). When rangelands remain intact, nomadic livestock keepers tend to stay within their area.

生态影响

减少气候和灾害风险

碳和温室气体的排放

增加
降低

火灾风险

增加
降低

6.3 技术对渐变气候以及与气候相关的极端情况/灾害的暴露和敏感性(土地使用者认为的极端情况/灾害)

渐变气候

渐变气候
季节 增加或减少 该技术是如何应对的?
年温度 增加

气候有关的极端情况(灾害)

气象灾害
该技术是如何应对的?
局地暴雨
局地风暴
气候灾害
该技术是如何应对的?
干旱
水文灾害
该技术是如何应对的?
比较和缓的(河道)洪水

其他气候相关的后果

其他气候相关的后果
该技术是如何应对的?
缩短生长期

6.4 成本效益分析

技术收益与技术建立成本相比如何(从土地使用者的角度看)?
短期回报:

积极

长期回报:

积极

技术收益与技术维护成本/经常性成本相比如何(从土地使用者的角度看)?
短期回报:

稍微积极

长期回报:

稍微积极

注释:

Both the short-term and the long-term benefits are very positive assuming that maintenance is done.

6.5 技术采用

如若可行,进行量化(住户数量和/或覆盖面积):

100% of the area covered

在所有采用这项技术的人当中,有多少人是自发的,即未获得任何物质奖励/付款?:
  • 0-10%
注释:

100% of land user families have adopted the Technology with external material support

Comments on acceptance with external material support: Fire breaks are economically viable but investment is high and generally asks for public investment. Cost sharing of beneficiaries has to be decided locally based on local conditions.

There is no trend towards spontaneous adoption of the Technology

Comments on adoption trend: Asks for strong commitment of either beneficiaries and or local government.

6.7 该技术的优点/长处/机会

编制者或其他关键资源人员认为的长处/优势/机会
Preventing wildfire contributes to safeguarding the fauna and flora over vast tracts of rangeland, which would otherwise be destroyed.

How can they be sustained / enhanced? The sustainability of firebreaks depends on how well they are maintained. Once they have been created, they need to be cleared every year if grasses have grown over them again. If there is little vegetation growth, they can be maintained once every two years or as required. If they are cleared manually, the communities or commune authorities must be well organised to ensure that the work is properly carried out. Good organisation is also required to ensure an effective response in the event of a fire (mobile unit).
It also avoids enormous economic losses in terms of livestock and infrastructure (herding villages, forage). When rangelands remain intact, nomadic livestock keepers tend to stay within their area.

6.8 技术的弱点/缺点/风险及其克服方法

编制者或其他关键资源人员认为的弱点/缺点/风险 如何克服它们?
The lack of financial and logistic resources is a constraint on the creation of firebreaks, and it is often difficult to organise the beneficiaries (nomadic livestock keepers) asked to participate financially or physically in the work required to establish and maintain them. Once the financing has been secured, considerable efforts are required to raise awareness about the need to prevent fires and mobilise the livestock keepers in a particular grazing area to become involved in the work.

7. 参考和链接

7.1 信息的方法/来源

7.3 链接到网络上的相关信息

标题/说明:

Good Practices in Soil and Water Conservation. A contribution to adaptation and farmers´ resilience towards climate change in the Sahel. Published by GIZ in 2012.

URL:

http://agriwaterpedia.info/wiki/Main_Page

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