Despite the prerequisite tools of sustainability, there is an arising need to particularly assess landscape sustainability (LS). In this regard, no quantitative approach was identified, neither locally nor internationally. The main objective of this current study is to design a new set of Landscape Indicators (LIs) and a new scheme of LS assessment. Accordingly, an inventive mixed research method was adopted, including different techniques, diverse data categories, and extensive analysis. 15 potential tools were examined, and 51 indicators were prioritized based on an inventive four-dimensional approach to LS. Diverse landscape experts and local stakeholders were consulted to justify the choice of LIs. Site visits and the different aspects of international and local policies were also considered. The new identified set of LIs was applied at Tannourine Cedar Forest Nature Reserve, North Lebanon. While some LIs showed a need for further attention, transformative management was proposed to actively present the unique identity of the reserve and make it a true sustainable Lebanese landscape. Remarkably, this research led to the establishment, for the first time, of an educational tool for landscape sustainability assessment, the LSA tool, that will help decision-makers towards landscape correction, conservation, or even protection.

In the absence of a holistic view of Landscape Sustainability, credible data and consistent information are needed to help decision making and support adaptive management. However, consolidated tools (system of standards and controls) of assessment exist, but show a complexity of the references on one hand, and are mostly qualitative and environmental indicators based on the other hand. This review article deals with the theme of both environmental and landscape indicators in general, the principles and the fundamental definitions. The main models used, the prerequisites and various fields of application are also taken into consideration. Last but not least, various environmental and landscape indicators are presented and compared.

In the absence of a holistic view of landscape sustainability, credible data and consistent information are needed to help decision-making and support adaptive landscape management. This course of events highlights a strong need for a tool (system of standards and controls) that can be used by multiple stakeholders (such as NGOs, public authorities, cooperatives, associations, higher education institutes, etc.) to analyze the state and sustainability of landscapes, predict any impact of new projects on the landscape, and develop urban and peri-urban planning policies. However, while consolidated tools of assessment exist, they exhibit complexity in their references. Existing assessment tools also lack specificity and are primarily limited to qualitative approaches. Although large sets of indicators are available and can be adopted, it is crucial to select a new set of non-conventional indicators that provide a holistic view of the various dimensions of the landscape. This review article aims primarily to discuss relevant models and prerequisites in order to later develop landscape indicators to complement—and in many cases—replace existing agro-ecological indicators. Landscape indicators will serve as a baseline for the proposed tool, which will employ a mixed methodology based on both qualitative and quantitative indicators. Additionally, various environmental and landscape indicators are presented and compared to identify the best reference to landscape sustainability. Various fields of application for indicators-based tools and the scales on which they can be applied are also considered. In particular, Lebanese landscapes exhibit variability in characteristics and possess a unique identity with genuine natural and built landscapes. Only recently has there been an increasing interest in sustainability assessment, particularly in relation to Lebanese Landscapes. Unfortunately, there is a likely gap in the studies, planning, and policies related to these landscapes. A tool that can evaluate, protect, conserve, and propose concrete solutions for these landscapes are needed more than ever.

Landscapes are vital systems where ecological, cultural, perceptual, and socio-economic values meet, making their quality assessment essential for sustainable development. Landscape Quality (LQ), shaped by the interaction of natural processes and human activities, remains methodologically challenging due to its interdisciplinarity and the need to integrate multiple dimensions. This challenge is particularly perceived in peri-urban areas, predominantly understudied in landscape research. This article addresses this gap in LQ assessment at peri-urban landscapes, through the case of Houch Al Oumaraa, Zahleh, a peri-urban area of patrimonial significance and agricultural landscape value. To evaluate the four spatial dimensions of LQ (structural, ecological, cultural and visual), we adopted a mixed methodology, where a pre-developed set of landscape indicators (LIs) applied within GIS and spatial technics, were supplemented by expert analysis through visual studies. Two questions framed this research: (i) is remote sensing sufficient to assess peri-urban LQ, and (ii) what are the limits of applying pre-developed LIs to diverse landscape contexts? Results show moderate fragmentation (CONTAG 61.6%), low diversity (MSDI 0.27), high density of cultural monuments (PROTAP 4.19) and average visual disharmony (FCDHI 0.49). Findings reveal that spatial dimensions alone are insufficient for assessing LQ of peri-urban landscapes, where socio-economic dimensions must also be integrated. Structural indicators (PLAND, MPA, ED, CONTAG) and MSDI proved transferable, while ECOLBAR was less applicable, cultural indicators (PROTAP, HLE) were limited to tangible heritage, and visual indicators (FCDHI, SDHI) highly context dependent. Establishing a differentiated yet standardized framework would not only enhance methodological precision but also ensure that LQ assessment remain relevant across diverse contexts, providing policymakers with actionable insights to align planning with sustainability goals.

Peri-urban forests are increasingly threatened by urbanization, fragmented governance, and limited land-use regulation, especially in Lebanon, where these landscapes play crucial ecological and cultural roles. Reliable sustainability assessment tools are needed to capture their multidimensional value and guide conservation strategies. This study applies the Landscape Sustainability Assessment (LSA) tool to Baabda Forest, a peri-urban green space of high ecological and cultural importance on the edge of Beirut, and compares the outcomes both with the LandScale framework and with results previously obtained from the Tannourine Cedar Forest Nature Reserve, a protected site in North Lebanon. Through a mixed-methods approach integrating spatial analysis, ecological fieldwork, socio-perceptual surveys, and institutional review, the research assessed ecological integrity, social functions, economic potential, and perceptual values. Findings show that Baabda Forest demonstrates significant ecological richness, cultural symbolism, and community engagement, but suffers from weak governance, lack of economic mechanisms, and absence of formal legal protection. In contrast, Tannourine benefits from structured management and national recognition, which strengthen its sustainability profile. The comparison between LSA and LandScale further reveals how international tools highlight governance and production issues but overlook cultural and perceptual dimensions that are critical in peri-urban contexts. This study demonstrates the added value of LSA as a holistic framework and emphasizes the need for participatory governance, sustainable economic activation, and legal designation to ensure Baabda Forest’s long-term sustainability, while providing insights transferable to similar landscapes globally.