1 / 13

EVALUASI SUMBERDAYA LAHAN

Dr. Danang Sri Hadmoko, S.Si., M.Sc. EVALUASI SUMBERDAYA LAHAN. RUANG LINGKKUP KAJIAN. 1. Definisi ESL Konsep/Faktor-faktor pembentuk lahan Satuan Pemetaan Lahan (Landform dan Land-Unit) Bentuk-bentuk pemanfaatan lahan (faktor-faktor penentu pemanfaatan lahan Metode Evaluasis SDL:

zorina
Download Presentation

EVALUASI SUMBERDAYA LAHAN

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dr. Danang Sri Hadmoko, S.Si., M.Sc. EVALUASI SUMBERDAYA LAHAN

  2. RUANG LINGKKUP KAJIAN • 1. Definisi ESL • Konsep/Faktor-faktor pembentuk lahan • Satuan Pemetaan Lahan (Landform dan Land-Unit) • Bentuk-bentuk pemanfaatan lahan (faktor-faktor penentu pemanfaatan lahan • Metode Evaluasis SDL: • Matching (Jenis, persyaratan dan penerapan) • Scoring (dasar penskoran, jenis analisis parametrik)

  3. RUANG LINGKKUP KAJIAN • Kemampuan Lahan • Kesesuaian lahan untuk pertanian • Kesesuaian lahan untuk non-pertanian

  4. Definition and Scope • Land evaluation is concerned with the assessment of land performance whenused for specified purposes. • It involves the execution and interpretation ofbasic surveys of climate, soils, vegetation and other aspects of land in termsof the requirements of alternative forms of land use.

  5. Scope and objectives of LE • How is the land currently managed, and what will happen if present practices remain unchanged? • What improvements in management practices, within the present use, are possible? • What other uses of land are physically possible and economically and socially relevant? • Which of these uses offer possibilities of sustained production or other benefits? • What adverse effects, physical, economic or social, are associated with each use? • What recurrent inputs are necessary to bring about the desiredproduction and minimize the adverse effects? • What are the benefits of each form of use?

  6. Steps of LE • Recognition of a need for change; • Identification of aims; • Formulation of proposals, involving alternative forms of land use, and recognition of their main requirements; • Recognition and delineation of the different types of land present in the area; • Comparison and evaluation of each type of land for the different uses; • Selection of a preferred use for each type of land; • Project design, or other detailed analysis of a selected set of • Alternatives for distinct parts of the area - this, in certain cases, may take the form of a feasibility study; • Decision to implement; • Implementation; • Monitoring of the operation.

  7. Principles of LE • Land suitability is assessed and classified with respectto specified kinds of use. • Evaluationrequires a comparison of the benefits obtained and theinputs needed on different types of land. • A multidisciplinaryapproach is required • Evaluation is made in terms relevantto the physical, economic andsocial context of the area concerned • Evaluationinvolvescomparison of more than a single kind of use

  8. What is land ? • Land comprises the physical environment, including climate, relief, soils,hydrology and vegetation, to the extent that these influence potential for landuse. • It includes the results of past and present human activity, e.g. Reclamationfrom the sea, vegetation clearance, and also adverse results, e.g. soil salinization. • Purely economic and social characteristics, however, are not includedin the concept of land; these form part of the economic and social context.

  9. MAPPING UNIT • A land mapping unit is a mapped area of land with specified characteristics.Land mapping units are defined and mapped by natural resource surveys,e.g. soil survey, forest inventory. • Their degree of homogeneity or of internalvariation varies with the scale and intensity of the study. • In some cases asingle land mapping unit may include two or more distinct types of land, withdifferent suitabilities, e.g. a river flood plain, mapped as a single unit butknown to contain both well-drained alluvial areas and swampy depressions.

  10. Land characteristics, land qualities and diagnostic criteria • A land characteristic is an attribute of land that can be measuredor estimated. Examples are slope angle, rainfall, soil texture, available watercapacity, biomass of the vegetation, etc. Land mapping units, as determinedby resource surveys, are normally described in terms of land characteristics. • If land characteristics are employed directly in evaluation, problems arisefrom the interaction between characteristics. For example, the hazard of soilerosion is determined not by slope angle alone but by the interaction betweenslope angle, slope length, permeability, soil structure, rainfall intensity andother characteristics. • Because of this problem of interaction,it is recommendedthat the comparison of land with land use should be carried out. in terms of land qualities.

  11. LAND QUALITY • A land quality is a complex attribute of land which acts in a distinctmanner in its influence on the suitability of land for a specific kind of use. • Land qualities may be expressed in a positive or negative way.

  12. Land improvements • Land improvements are activities which cause beneficial changes in thequalities of the land itself. Land improvements should be distinguished fromimprovements in land use, i.e. changes in the use to which the land is put ormodifications to management practices under a given use.

More Related