A pair of papers looking at the intel aspect of the invasion and occupation:

From the (Canuck) Journal of Conflict Studies back in '96:

Perceptions and Misperceptions: Influences on Israeli Intelligence Estimates During the 1982 Lebanon War
...In simplified terms, Operation Peace for Galilee (as the invasion was code-named) was based on a combination of misconceptions about Israel's alliance with the Maronites in Lebanon and an overestimation of Israel's military capabilities, underlined by the mistaken belief that force could achieve real peace. Israel saw Lebanon as a Christian state and the Maronites as the predominant community backed militarily by the Lebanese Forces. Moreover, Israel perceived the Maronites it was liaising with as representative of the community and as reliable.

To fully understand this failure in Israel's national intelligence estimates, not only the actual misconceptions but also the process of intelligence evaluation needs to be analyzed. Moreover, within this framework, it is essential to examine the signals as well as the noise that obscures them and can prevent them from being understood. In the Lebanon War, as in other historical examples, such as the Cuban Missile Crisis, 2 the Yom Kippur War,3 or the US failure to predict the Iranian Revolution in 1979, 4 the intelligence failure was not due to lack of information about the adversaries, but to an incorrect evaluation of the available information, noise, false signals or deception, misconceptions and ideology....
The second is from Intelligence and National Security, Autumn '01:

"A Reach Greater than the Grasp": Israeli Intelligence and the Conflict in South Lebanon 1990–2000
(AKO log-in required)
This article examines the way in which intelligence was used by Israel
in its war against Hizb’allah in south Lebanon. By using ideas drawn from the literature on strategic culture, it argues that in trying to replicate methods used in countering Palestinian insurgents, Israel’s intelligence agencies failed to appreciate fully the finite political aims of Hizb’allah’s guerrilla struggle. As such, the paucity in Israel’s collective intelligence effort allowed operatives of Hizb’allah’s military wing, al-Muqawama, to score notable intelligence triumphs over Israel, triumphs that did much force the IDF into a unilateral withdrawal from south Lebanon in May 2000....