Land suitability mapping

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Land suitability mapping is a method to identify the most suitable land units for a range of land use systems. A step-wise procedure is used to survey existing resources, identify constraints and opportunities for change. The first step normally includes land cover mapping.

Land cover mapping produces maps of vegetation patterns, soil and land use types. The mapping scale corresponds to the level of details from the use of aerial photographs and satellite images. Normally there is no distinction made between natural and human induces land cover. Land cover mapping is usually performed in the early stages of land use planning, where baseline information about natural resources and constraints are collected. Map units refer to very broad categories of land cover, such as "coniferous forest" or "urban areas".

Land capability classification identifies those areas with the highest potential for a large number of land uses on the basis of their production potential. The method is similar to land suitability mapping but operates at a more general level. Land suitability mapping is a kind of detailed land assessment, i.e. the fitness of land use for a specific use, e.g. "partly suitable farming with wheat as the best yielding crop".

Normally a soil map serves as a base map to indicate homogenous land areas with similar properties (soil type, climate, vegetation). The units identified are called land units. It is an area of land which possesses specific land characteristics and land qualities and which can be mapped.

The starting point for suitability mapping is a mapping of the most relevant factors for a given land use. These factors also called land attributes, are divided into 1) land qualities and 2) land characteristics.

The following "rules of thumb" can be used to identify the land qualities which should be part of a land suitability mapping:

- the land quality must have a substantial effect on performance or on cost of production;

- critical values of the land quality must occur in the planning area;

- it is realistic to measure or estimate the value of the land quality. Furthermore, one should beware of variations in values of a given land quality during a cropping season and the impact variations have on crop yields. Care should be taken to select values from measurements representing critical moments in crop growth.

Lesson 4. CENTRAL IDEA OF LAND USE PLANNING

1. Прочтите следующие слова:

Integrated, dialogue, initiating, conceivable, iterative, appropriate, impose, groundwater, support, pollution, traffic, addition, society, superfluous, view, expense, core, designed.

2. Прочтите и переведите следующие группы слов:

Exact role, environmental context, lack of planning, the consequences of land use activities, new findings, implementation and monitoring, forming a consensus, co-operation relations, long-term sustainability, local knowledge, living conditions, kind of benefits, existing environmental damage, direct and indirect land users.

3. Запомните следующие слова и словосочетания:

aim (n.) – цель

(v.) – нацеливать, стремиться

amongst (prep.) – среди, между

attain (v.) – достигнуть, добиться

authorities (n.) – власти

compatible (adj.) – конкурентно-способный

compulsory (adj.) – обязательный

concealed lack of planning – скрытые недостатки планирования

conciliation (n.) – примирение, умиротворение

constellation (n.) – совокупность

constraint (n.) – противаречивость, ринужденность, скованность, напряженность

density (n.) – плотность

disregard (v.) – игнорировать

draw up (v.) – составлять

erosion control – борьба с эрозией

exact (adj.) – точный

flexible (adj.) – гибкий

forestry (n.) – лесничество, лесоводство

groundwater (n.) – грунтовая вода

guidance (n.) – руководство

in addition (adv.) – вдобавок, в дополнение

iterative process – повторяющийся, многократный процесс

justify (v.) – оправдывать

magnitude (n.) – величина

moisture (n.) – влажность

negotiation (n.) – переговоры, обсуждение условий

nutrients (n.) – питательные вещества

perceive (v.) – воспринимать

plot of land – участок земли

population (n.) – население

relatively (adv.) – относительно

require (v.) – требовать

requirement (n.) – требование

sense (n.) – смысл, значение

service (n.) – услуга, обслуживание

settling conflicts – урегулирование конфликта

simultaneously (adv.) – одновременно

stakeholders – акционеры

steps already taken – уже предпринятые шаги

suitability (n.) – пригодность, приемлемость

superfluous (adj.) – излишний

term (n.) – термин, срок, условие

tolerance (n.) – сопротивляемость, устойчивость

tool (n.) – инструмент

unsuitable (adj.) – непригодный

use-restricted area – территория с ограничениями в использовании

Viable (adj.) – жизненный

Yield (n.) – урожай

(v.) – производить, давать

4. Прочитайте и переведите следующий текст:

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